Irish Last Names

Five real Irish last names per press, each with the origin its dictionary entry gives and its US census rank.

Irish Last Names

DoughertyVariant of Doherty. US census rank 950.
BarryAnglicized form of Irish Bairre, short form of Fionnbharr, from fionn (“white”) + barr (“head”). US census rank 708.
ConleyAnglicization of Irish Ó Conghalaigh and Ó Conghaile, patronyms of Conghalach. US census rank 622.
McKeeIrish: Mac Aodha. US census rank 802.
BryantA patronymic derived from Brian. US census rank 135.

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How it works

These Irish last names are real: 1,111 surnames a dictionary derives from Irish, most with the Irish-language form and what it means. Murphy is Ó Murchadha, descendant of Murrough.

Read the full guide

Popular Irish last names in America

The page opens on the 65 names in the US census top 1,000, the popular Irish last names of America: Murphy is 65th of all US last names and Kelly 80th. They answer a search for Irish American last names; the rank is not a rank in Ireland. Choose Any rank for the whole list.

Irish last names, meaning and type

Under More filters, Type sorts the list: 408 Ó names (descendant of), 389 Mac names (son of) and 314 others. Irish last names starting with Mc number 324 here; pick M in the letter row for all 414 Irish last names starting with M.

Tips

Irish last names starting with C number 128 here, and Irish last names starting with D 93.
The census drops apostrophes, so it counts O'Brien as OBRIEN; the card keeps the apostrophe.

Questions and answers

What do Irish last names mean?

Most name an ancestor. Ó means descendant of and Mac means son of: O'Brien is Ó Briain, descendant of Brian, and McCarthy is Mac Carthaigh, son of Carthach. A card gives the meaning its dictionary entry gives, and none where the entry gives none.

What are the most common Irish last names?

In the 2020 US census Murphy, Kelly, Sullivan, Bryant and Kennedy lead the names on this list. Those are common Irish last names in America; for Ireland itself this page uses no count, so it gives no rank there.

Is this an Irish last name generator?

Yes. Each press deals five real Irish surnames at random, and a filter narrows the draw to Ó names, Mac names or one letter. Nothing is invented: every name is in the US census and in a dictionary.

Why do Irish last names start with O' or Mc?

Both mark a family line: O' stands for Ó, descendant of, and Mc or Mac is son of. Norman families in Ireland took names with de instead, such as de Búrca, which became Burke.

All 1,111 last names

In the US census top 1,000 65

Barry Anglicized form of Irish Bairre, short form of Fionnbharr, from fionn (“white”) + barr (“head”). US census rank 708.
Blake Irish: Ó Bláthmaic. US census rank 450.
Boyle As an Irish surname, Anglicized from Irish Ó Baoithghill, possibly a compound of baoth (“vain, foolish”) and geall (“pledge”). US census rank 905.
Brady Irish: Ó Brádaigh. US census rank 465.
Brennan From Irish Ó Braonáin (“descendant of Braonán”), a diminutive of braon (“moisture, drop”). US census rank 697.
Bryan A patronymic derived from Brian. US census rank 598.
Bryant A patronymic derived from Brian. US census rank 135.
Callahan From Irish Ó Ceallacháin, from Ceallachán, diminutive of the given name Ceallach. US census rank 682.
Carroll Derived from the Irish Ó Cearbhaill. US census rank 226.
Casey Anglicization of an Irish surname Ó Cathasaigh (“descendant of (a person named) Watchful”). US census rank 519.
Coffey Anglicized form of Irish Ó Cobhthaigh (“descendant of Cobhthach”), a byname meaning "victorious". US census rank 992.
Conley Anglicization of Irish Ó Conghalaigh and Ó Conghaile, patronyms of Conghalach. US census rank 622.
Curry As an Irish surname, from Ó Comhraidhe (“descendant of Comhraidhe”). US census rank 443.

Show all 1,111 last names (1,098 more)

In the US census top 1,000, continued

Dillon From the Irish surname, from Breton Leon and Norman Léon, named after Sir Henry de Leon of the Viscounty of Léon. US census rank 698.
Donovan From Irish Ó Donndubháin (“descendant of (a person named) brown & black”), from donn (“brown”) and dubh (“black”). US census rank 878.
Dougherty Variant of Doherty. US census rank 950.
Doyle From Irish Ó Dubhghaill (“descendant of Dougal”). US census rank 447.
Duffy From the Irish surname, from Ó Dubhthaigh (“descendant of Dubhthach”) and Mac Duibhshíthe (“son of Duibhshíth”). US census rank 915.
Duncan As a Scottish Gaelic and Irish surname, from Donnchadh, a name composed of donn (“brown”) + cath (“battle”). US census rank 222.
Dunn Reduced Anglicized form of Irish Ó Duinn (“descendant of Donn”), a byname from donn (“brown, brown-haired”). US census rank 204.
Farrell US census rank 658.
Flynn Anglicized from Irish Ó Floinn, "descendant of Flann (red)". US census rank 537.
Foley Reduced Anglicized form of Irish Ó Foghladha (“descendant of Foghlaidh”), a byname from foghlaí (“plunderer, pillager, marauder, robber”). US census rank 667.
Gallagher From Irish Ó Gallachóir, from Old Irish Ó Gallchobhair, Ó Gallchobhoir, a surname meaning "descendants of Gallchobair". US census rank 488.
Hanna From anglicization of Irish Ó hAnnaidh (“descendant of Annadh”), from annadh (“delay”). US census rank 818.
Higgins An anglicized version of Irish Ó hUiginn (“descendant of a Viking”). US census rank 422.
Hines US census rank 475.
Hogan An anglicized form of Irish Ó hÓgáin or Ó hEochagáin. US census rank 546.
Kelley A less common spelling of Kelly. US census rank 203.
Kelly Irish Ó Ceallaigh. US census rank 80.
Kennedy Irish Ó Cinnéidigh (ceann (“head”) + éidigh (“ugly”)) or Scottish Gaelic Ceannaideach (ceann (“head”) + aideach (“ugly”)). US census rank 149.
Lynch As an Irish surname, from Ó Loingsigh (“descendant of Loingseach”), from long (“ship”). US census rank 269.
Mahoney Reduced Anglicized form of Irish Ó Mathghamhna (“descendant of Mathghamhain”), a personal name composed of the elements math (“bear”) and gamhain (“calf”). US census rank 884.
Malone From Irish Ó Maol Eoin. US census rank 489.
Manning US census rank 448.
McBride Anglicized form of Irish and Scottish Gaelic Mac Brighde (“son of the servant of (Saint) Brigit”). US census rank 535.
McCarthy Irish Mac Carthaigh (“son of Carthach”). US census rank 395.
McCarty Southern Irish variant of McCarthy. US census rank 981.
McClure Anglicized form of Scottish Gaelic Mac Gille Uidhir and Irish Mac Giolla Uidhir (“son of the dun lad”), from Mac + gille + uidhir, obsolete form of odhar (“dun; dark”). US census rank 742.
McCormick From Scottish Gaelic and Irish Mac Cormaic (“son of Cormac”). US census rank 543.
McCullough Anglicized form of Irish Mac Cú Uladh. US census rank 769.
McDowell Anglicized form of Irish and Scottish Gaelic MacDubhghaill (“son of the dark stranger”), equivalent to mac + Dubhghall. US census rank 704.
McGee Anglicized form of Irish mac Aodha. US census rank 453.
McGuire Anglicized from Irish mag Uidhir. US census rank 534.
McKee Irish: Mac Aodha. US census rank 802.
McLaughlin Anglicized from Irish Mac Lochlainn (“son of Lochlan”). US census rank 446.
McLean An anglicization of Irish Mac Giolla Eoin (“son of the servant of John”). US census rank 809.
McMahon Anglicized form of Irish Mac Mathúna, earlier spelling Mac Mathghamhna (“son of the bear”), from Middle Irish mac (“son”) and mathgamain (“bear”). US census rank 893.
Moran As an Irish surname, an anglicization of Ó Móráin, from Ó (“descendant”) and Móráin (“of Mórán”), from mór (“large, great”). US census rank 358.
Morrow As an Irish surname, variant of McMorrow. US census rank 609.
Murphy From Irish Ó Murchadha (“descendant of Murrough”), Mac Murchaidh (“Son of Murrough”), etc. US census rank 65.
Neal A patronymic derived from Niall. US census rank 348.
Nolan Anglicized from Irish Ó Nualláin (“descendant of Nuallán”), diminutive of nuall (“chariot-fighter, champion”). US census rank 770.
O'Brien Anglicization of the Irish surname Ó Briain, meaning “descendant of Brian”. US census rank 261.
O'Connell Anglicization of Irish Ó Conaill (“descendant of Connel”). US census rank 986.
O'Connor Anglicization of Irish Ó Conchúir, meaning "descendant of Conor". US census rank 416.
O'Donnell From Irish Ó Dónaill, Ó Domhnaill (“of Domhnall”). US census rank 784.
O'Neal Variant of O'Neill. US census rank 733.
O'Neill Anglicization of an Irish surname meaning "descendant of Niall". US census rank 673.
Quinn The surname is Irish Ó Coinn (“descendant of Chief”). US census rank 429.
Reilly From Irish Ó Raghallaigh, a surname meaning "descendants of Raghallach". US census rank 853.
Ryan An anglicization of Irish Ó Riaghain, Ó Riain (“descendant of Riaghan, Rian”). US census rank 201.
Shannon Variant of Shanahan, anglicized from Ó Seanaigh (“descendant of a person named Old”). US census rank 767.
Sullivan Clipping of O'Sullivan. US census rank 107.
Sweeney Anglicized form of Irish Ó Suibhne. US census rank 660.

US census ranks 1,001 to 10,000 376

Ahearn Variant of Ahern. US census rank 7,075.
Ahern Anglicized form of Irish Ó hEachthighearna (“descendant of Eachthighearna”), a personal name composed by the elements each (“horse”) + tighearna (“master, lord”). US census rank 4,334.
Begley Reduced Anglicized form of Irish Ó Beaglaoich (“descendant of Beaglaoch”), a personal name composed of the elements beag (“small”) + laoch (“warrior, hero”). US census rank 4,233.
Bergin Reduced Anglicized form of Irish Ó Beirgin, an altered form of Ó hAimheirgin, a personal name probably composed of the elements amhra (“wonderful”) and gin (“birth”). US census rank 8,446.
Bohannon Reduced Anglicized form of Irish Ó Buadhachanáin (“descendant of Buadhachanán”), a double diminutive of buadhach (“victorious”). US census rank 3,700.
Boylan Reduced Anglicized form of Irish Ó Baoighealláin (“descendant of Baoigheallán”), a diminutive of Baoigheall. US census rank 5,504.
Bracken As an Irish surname, from Ó Breacáin (“descendant of Breacán”), from Breacán, a name diminutive of breac (“spotted”). US census rank 4,458.
Braden Anglicized from an Irish surname Ó Bradáin (“descendant of Bradán”), from a personal name meaning "salmon," from bradán (“salmon”). US census rank 2,798.
Brazil Reduced Anglicized form of Irish Ó Breasail (“descendant of Breasal”), a byname meaning "strife". US census rank 6,491.
Breslin Reduced Anglicized form of Irish Ó Breisláin (“descendant of Breisleán”), a diminutive of the personal name Breasal. US census rank 7,607.
Brogan Anglicized form of Irish Ó Brógáin (“descendants of Brógán”), probably from a diminutive of bróg (“shoe”). US census rank 4,644.
Brophy Anglicized form of Irish Ó Bróithe (“descendant of Bróth”), a personal name or byname of unknown origin. US census rank 5,346.
Byrne Reduced Anglicized form of Irish Ó Broin (“descendant of Bran”), a personal name based on bran (“raven”). US census rank 1,198.
Cahill Anglicized from Irish Ó Cathail. US census rank 1,738.
Cahoon Irish variant of Colquhoun. US census rank 7,035.
Callaghan Variant of Callahan. US census rank 5,576.
Callan Irish Ó Cathaláin (“descendant of Cathalán”). US census rank 7,892.
Canty Reduced Anglicized form of Irish Ó an Cháintighe (“descendant of the satirist”), from cáinteach (“satirical”). US census rank 4,692.
Carmody Anglicized form of Irish Ó Cearmada (“descendant of Cearmaid”), a personal name of unknown origin. US census rank 5,966.
Carnahan Reduced Anglicized form of Irish Ó Cearnacháin (“descendant of Cearnachán”), a personal name from cearnach (“victorious”) + -án (“diminutive suffix”). US census rank 4,828.
Carrick Anglicized version of Irish carraig, Scottish Gaelic carraig or Cornish karrek, all meaning rock. US census rank 8,540.
Cassidy From the Irish surname, Anglicized from Ó Caiside (“descendant of Caiside”), from cas (“curly-haired”). US census rank 1,347.
Cavanaugh Variant of Kavanagh. US census rank 2,076.
Clancy Reduced Anglicized form of Irish Mac Fhlannchaidh (“descendant of a person named Red Warrior”), from flann (“blood-red”). US census rank 2,942.
Cleary Reduced Anglicized form of Irish Ó Cléirigh (“descendant of the cleric”), from cléireach (“cleric”). US census rank 2,306.
Coakley Reduced Anglicized form of Irish Mac Caochlaoich (“son of Caochlaoch”). US census rank 5,717.
Cody Anglicized from Irish Ó Cuidighthigh (“descendant of Cuidightheach”) or Mac Óda (“son of Odo”). US census rank 1,922.
Coggins Variant of Coogan. US census rank 4,645.
Colgan Reduced Anglicized form of Irish Ó Colgáin (“descendant of Colgán”), a personal name derived from a diminutive form of colg (“thorn; sword”). US census rank 9,313.
Condon Anglicized form of Irish Condún. US census rank 2,795.
Conlon From Irish Ó Connalláin, which could be from con (“hound”) + leon (“lion”), though the second element could instead be from gal (“valor”), similar to O'Connell. US census rank 4,619.
Connelly Anglicized form of the Irish surnames Ó Conghalaigh and Ó Conghaile, patronyms of the given name Conghalach. US census rank 1,587.
Connolly Anglicization of Irish Ó Conghalaigh and Ó Conghaile, patronyms of Conghalach. US census rank 1,205.
Connor The surname is from Irish Ó Conchúir (“descendant of Conchúr”). US census rank 1,218.
Conroy Anglicized form of Irish Ó Conraoi (“descendant of Cú Raoi”). US census rank 2,238.
Cooney Anglicized form of Irish Ó Cuana (“descendant of Cuana”), a personal name either derived from cú (“hound”) or cuanna (“elegant, comely”). US census rank 2,935.
Corcoran From Irish Ó Corcráin (“descendant of Corcrán”). US census rank 2,056.
Costello As an Irish surname, reduced Anglicized form of Irish Mac Oisdealbhaigh (“son of Oisdealbhach”). US census rank 1,121.
Coughlin Anglicized form of Irish Ó Cochláin (“descendant of Cochlán”), a personal name derived from a diminutive of cochal (“cloak, hood”). US census rank 2,534.
Coyle An anglicized form of the Irish surname Irish Mac Dhubhghaill. US census rank 1,811.
Coyne Anglicized form of Irish Ó Cuáin (“descendants of Cuán”), a byname from a diminutive of cú (“hound, dog”). US census rank 3,183.
Cronin Reduced Anglicized form of Irish Ó Cróinín (“descendant of Cróinín”), a byname derived from a diminutive form of crón (“swarthy”). US census rank 1,899.
Culley Variant of Cully. US census rank 9,216.
Curley Reduced form of McCurley. US census rank 3,027.
Curran Reduced Anglicized form of Irish Ó Corraidhín (“descendant of Corraidhín”), a personal name derived from a diminutive of corradh (“spear”). US census rank 1,450.
Dailey Variant of Daly. US census rank 1,102.
Daley From Irish Ó Dálaigh. US census rank 1,414.
Daly Anglicization of the Irish surname Ó Dálaigh, from dálach (“frequenting meetings”). US census rank 1,128.
Darrah Variant of Darragh. US census rank 9,765.
Daugherty Variant of Doherty. US census rank 1,037.
Deegan Reduced Anglicized form of Irish Ó Duibhginn (“descendants of Duibhgeann”), a byname composed of the elements dubh (“black”) + ceann (“head”). US census rank 9,225.
Delaney From a Norman baronial surname, from a place in France. In Ireland an anglicization of Irish Ó Dubhshláine. US census rank 1,101.
Dempsey Reduced Anglicized form of Irish Ó Díomasaigh (“descendant of Díomasach”), a byname deriving from díomasach (“proud, arrogant”). US census rank 1,330.
Desmond From Irish Ó Deasmhumhnaigh. US census rank 4,859.
Devaney Reduced Anglicized form of Irish Ó Duibheannaigh (“descendant of Duibheannach”), a personal name of unclear origin. US census rank 7,871.
Devine Reduced Anglicized form of either of two Irish surnames, Ó Duibhín (“descendant of Duibhín”). US census rank 1,522.
Devlin From Irish Ó Duibhlin. US census rank 2,820.
Doane Reduced Anglicized form of Irish Ó Dubháin (“descendant of Dubhán”), a diminutive of dubh (“black”), or a reduced Anglicized form of Ó Damháin (“descendant of Damhán”). US census rank 5,621.
Doherty From Irish Ó Dochartaigh. US census rank 1,280.
Dolan From Irish Ó Duibhlin. US census rank 1,312.
Donahue Reduced Anglicized form of Irish Ó Donnchadha (“descendant of Donnchadh”), a personal name composed of the elements donn (“brown-haired”) + cath (“battle”). US census rank 1,152.
Donegan Reduced Anglicized form of Irish Ó Donnagáin (“descendant of Donnagán”), a personal name derived from a double diminutive of donn (“brown”). US census rank 8,257.
Donoghue From Irish Ó Donnchadha (“descendant of Duncan”). US census rank 9,738.
Donohue Variant of O'Donoghue, from Irish Ó Donnachú. US census rank 2,584.
Dooley Reduced Anglicized form of Irish Ó Dubhlaoich (“descendant of Dubhlaoch”), a personal name composed by the elements dubh (“black”) + laoch (“hero”). US census rank 1,537.
Doran Reduced Anglicized form of Irish Ó Deoradháin (“descendant of Deoradhán”), a personal name derived from a diminutive of deoradh (“pilgrim, exile, stranger”). US census rank 2,241.
Dowd Reduced Anglicized form of Irish Ó Dubhda (“descendant of Dubhda”), a byname derived from dubh (“black”). US census rank 2,686.
Dowdell Variant of Dowdall. US census rank 6,780.
Dowdy Variant of Dowd. US census rank 2,736.
Drennan Reduced Anglicized form of Irish Ó Draighneáin (“descendant of Draighneán”), a byname from draighneán (“blackthorn tree”). US census rank 7,876.
Driscoll From Irish Ó hEidirsceoil and Ó Drisceoil. US census rank 1,525.
Dugan Reduced Anglicized form of Irish Ó Dubhagáin (“descendant of Dubhagán”), a personal name based on a double diminutive of dubh (“black”). US census rank 1,749.
Duggan Variant of Dugan. US census rank 2,960.
Dulaney A variant of Delaney. US census rank 6,193.
Dunne Reduced Anglicized form of Irish Ó Duinn (“descendant of Duinn”), a byname from donn (“brown”). US census rank 3,941.
Durkin Reduced Anglicized form of Irish Mac Duarcáin (“son of Duarcán”), a personal name from a diminutive of duairc (“surly, morose”). US census rank 4,708.
Dwyer Reduced Anglicized form of Irish Ó Duibhidhir (“descendant of Duibhuidhir”), a personal name composed of the elements dubh (“black, dark”) + odhar (“sallow, tawny”). US census rank 1,296.
Eagan Variant of Egan. US census rank 6,372.
Eakin Variant of Egan. US census rank 9,197.
Egan From Irish Ó hAodhagáin, literally “descendant of Aodhagán”, from Old Irish Áedacán, from Áed + acán, from áed (“fire”). US census rank 1,569.
Ennis Irish Inis. US census rank 2,271.
Enright Reduced Anglicized form of Irish Mac Ionnrachtaigh (“son of Ionnrachtach”), a byname meaning "attacker"; compare Hanratty. US census rank 5,018.
Fahey Reduced Anglicized form of Irish Ó Fathaidh (“descendant of Fathadh”), a byname from fothadh (“base, foundation, support”). US census rank 3,864.
Fallon Reduced Anglicized form of Irish Ó Fallamhain (“descendant of Fallamhan”), a personal name related to follúnaitheoir (“ruler, governor”). US census rank 3,085.
Feeley Reduced form of McFeeley or a variant of Falvey. US census rank 8,012.
Feeney Reduced Anglicized form of Irish Ó Fiannaidhe (“descendant of Fiannaidhe”), a byname meaning "warrior", from fiann (“army”). US census rank 3,735.
Ferry A reduced Anglicized form of Irish Ó Fearadhaigh (“descendant of Fearadhach”). US census rank 3,596.
Finnegan Borrowed from Irish Ó Fionnagáin (“descendant of Fionnagán”). US census rank 3,428.
Finnerty Reduced Anglicized form of Irish Ó Fionnachta (“descendant of Fionnachta”), a personal name composed of the elements fionn (“fair, white”) + sneachta (“snow”). US census rank 8,025.
Flaherty From Irish Flaithbheartach, Flaithbheartaigh (“bright ruler”). US census rank 2,027.
Flanagan From Irish Ó Flannagáin (“descendant of Flannagán”), a personal name from a double diminutive of flann (“blood red”). US census rank 1,166.
Flanigan Variant of Flanagan. US census rank 4,762.
Flannery Reduced Anglicized form of Irish Ó Flannabhra (“descendant of Flannabhra”), a personal name derived from flann (“blood red”) + abhra (“eyebrow”). US census rank 3,381.
Fogarty Anglicized form of Irish Ó Fógartaigh (“descendant of Fógartach”), a personal name from fógartha (“proclaimed; banished, outlawed”). US census rank 4,391.
Gaffney Reduced Anglicized form of Irish Ó Gamhna (“descendant of Gamhain”), a byname from gamhain (“calf”). US census rank 2,858.
Gainey Reduced Anglicized form of Irish Mac Géibheannaigh (“son of Géibheannach”), a personal name derived from géibheannach (“fettered”). US census rank 4,374.
Gallaher Variant of Gallagher. US census rank 8,383.
Galligan Reduced Anglicized form of Irish Ó Gealagáin (“descendant of Gealagán”), a personal name which derives from a double diminutive of geal (“bright, white”). US census rank 9,974.
Galvin Reduced Anglicized form of Irish Ó Gealbháin (“descendant of Gealbhán”), a personal name composed of the elements geal (“bright”) and bán (“white”). US census rank 3,032.
Gannon Derived from Irish Mag Fhionnáin "son of Finan". US census rank 2,451.
Garvey Reduced form of Irish Ó Gairbhshíth (“descendant of Gairbhshíth”), a personal name composed of the elements garbh (“rough, cruel”) and síth (“peace”). US census rank 3,185.
Gaughan Reduced Anglicized form of Irish Ó Gaoithin. US census rank 9,543.
Geary As an Irish surname, from Ó Gadhra, from gadhar (“hound”). US census rank 2,989.
Geraghty From Irish mac Oireachtach (“son of a member of the Oireachtas”). US census rank 9,273.
Gilliland Reduced Anglicized form of Scottish Gaelic Mac Gille Fhaoláin and Irish Mac Giolla Fhaoláin (“son of the servant of (saint) Faolán”). US census rank 2,741.
Gleason Reduced Anglicized form of Irish Ó Glasáin (“descendant of Glasán”), a personal name which derives from a diminutive form of glas (“green, blue, gray”). US census rank 1,419.
Glennon Reduced Anglicized form of Irish Mac Leannáin (“son of Leannán”), a personal name from leann (“cloak”) + -án (“diminutive suffix”). US census rank 9,407.
Gorman Reduced Anglicized form of Irish Ó Gormáin (“descendant of Gormán”), a personal name derived from a diminutive form of gorm (“dark blue; noble”). US census rank 1,145.
Gormley Reduced Anglicized form of Irish Ó Gormghail (“descendant of Gormghal”), a personal name based on gorm (“blue”) + gal (“valor”). US census rank 6,727.
Grady From the Irish surname, from Ó Grádaigh (see O'Grady) or Mag Bhrádaigh (see McGrady). US census rank 1,388.
Grogan Reduced Anglicized form of Irish Ó Grúgáin (“descendant of Grúgán”). US census rank 3,274.
Hagan From the Irish surname, from Ó hÁgáin, "descendant of Ógán", diminutive of óg (“young”). US census rank 1,758.
Hagerty Variant of Haggerty. US census rank 6,110.
Haggerty Anglicized form of Irish Ó hÉigceartaigh (“descendant of Éigceartach”), a personal name meaning "unjust". US census rank 3,271.
Halloran Reduced Anglicized form of Irish Ó hAllmhuráin (“descendant of Allmhurán”), a personal name derived from a hypocoristic form of allmhurach (“foreigner”). US census rank 6,365.
Hamill Of multiple origins, but chiefly a reduced Anglicized form of Irish Ó hÁdhmaill (“descendant of Ádhmall”), a nickname from ádhmall (“active”). US census rank 6,177.
Hanlon Reduced Anglicized form of Irish Ó hAnluain (“descendant of Anluan”), a personal name composed of the intensive prefix an- + lúan (“light, radiance; warrior”). US census rank 3,474.
Hannan Reduced Anglicized form of Irish Ó hAnnáin (“descendant of Annán”), a personal name of uncertain origin. US census rank 5,438.
Hannigan Reduced Anglicized form of Irish Ó hAnnagáin (“descendant of Annagán”), a hypocoristic form of Annach (“Hanna”). US census rank 7,514.
Hannon Reduced Anglicized form of Irish Ó hAinchín (“descendant of Ainchín”), a personal name possibly related to Annach or, alternatively, a variant of ainghein (“unborn”). US census rank 3,171.
Hanrahan Reduced Anglicized form of Ó hÁnradháin (“descendant of Ánradhán”), a diminutive of ánradh (“warrior”). US census rank 6,054.
Harrigan Reduced Anglicized form of Irish Ó hArragáin, a corruption of Ó hÁnradháin (“descendant of Ánradhán”), a diminutive of ánradh (“warrior”). US census rank 5,566.
Healy Reduced Anglicized form of Irish Ó hÉilidhe (“descendant of the claimant”), from éilidhe (“claimant”), or from Irish Ó hÉalaighthe (“descendant of Éaladhach”). US census rank 1,679.
Heaney Reduced Anglicized form of Irish Ó hÉighnigh (“descendant of Éighneach”), or an Anglicized form of Ó hÉanna (“descendant of Éanna”), a personal name of unclear origin. US census rank 8,632.
Heffernan Anglicized form of Irish Ó hIfearnáin (“descendant of Ifearnán”). US census rank 5,151.
Hegarty Variant of Haggerty. US census rank 9,495.
Hennessey Anglicized from Irish Ó hAonghusa (“descendant of Angus”). US census rank 4,451.
Hennessy Anglicized from Irish Ó hAonghusa (“descendant of Angus”). US census rank 3,821.
Hickey From Irish Ó hÍcidhe (“descendant of a healer”), from ící (“healer”). US census rank 1,253.
Hoey A variant of Haughey, a surname of Irish origin. US census rank 8,152.
Horan Anglicized form of Irish Ó hUghróin (“descendant of Ughrón”) or Ó hOdhráin (“descendant of Odhrán”). US census rank 3,514.
Horgan Reduced Anglicized form of Irish Ó hArgáin, a contracted form of Ó hArragáin, from which Harrigan. US census rank 8,810.
Houlihan Anglicized form of Irish Ó hUallacháin (“descendant of Uallachán”), a personal name derived from a diminutive of uallach (“proud, arrogant”). US census rank 8,328.
Hynes Reduced Anglicized form of Irish Ó Eidhin (“descendant of Eidhin”). US census rank 4,439.
Karns Variant of Kearns. US census rank 8,918.
Kavanagh Borrowed from Irish Caomhánach. US census rank 6,166.
Kavanaugh Variant of Kavanagh. US census rank 5,947.
Keane Probably Irish Ó Catháin (“descendant of Cathán”). US census rank 3,304.
Kearney Irish Ó Ceithearnaigh. US census rank 1,805.
Kearns Anglicized form of Irish Ó Céirín, a personal name derived from a diminutive of ciar (“dark”). US census rank 2,502.
Keegan Irish Mac Aodhagáin (“son of Aidan”). US census rank 3,643.
Keeley Reduced Anglicized from Irish Ó Caollaidhe (“descendant of Caollaidhe”), a personal name based on the adjective caol (“slender, graceful”). US census rank 6,381.
Keeney Variant of Keaney. US census rank 4,009.
Kehoe Variant of Keough. US census rank 4,610.
Kelleher From Irish Ó Céileachair (“descendant of Céileachar”), from the male given name Céileachar (“spouse-loving”), from céile (“spouse, companion”), from Old Irish céile. US census rank 3,630.
Keough Reduced Anglicized form of Irish Mac Eochaidh. US census rank 7,292.
Kerley Variant of Curley. US census rank 7,279.
Kerrigan Reduced Anglicized form of Irish Ó Ciaragáin (“grandson/descendant of Ciaragán”), a byname from a double diminutive of ciar (“black”). US census rank 6,144.
Kerwin Variant of Kirwan. US census rank 9,102.
Killion Variant of Killeen. US census rank 6,846.
Kinsella Reduced Anglicized form of Irish Ó Ceinnsealaigh. US census rank 7,751.
Lafferty Reduced Anglicized form of Irish Ó Laithbhearthaig. US census rank 3,562.
Langan Reduced Anglicized form of Irish Ó Longáin (“descendant of Longán”). US census rank 7,099.
Lavery Reduced Anglicized form of Irish Ó Labhradha (“descendant of Labhraidh”), a byname from labhraidh (“spokesman”), from labhair (“to speak”). US census rank 8,810.
Lavin A reduced Anglicized form of Irish Ó Láimhín, variant of Ó Flaithimhín (“descendant of Flaithimín”). US census rank 5,387.
Lawler Reduced Anglicized form of Irish Ó Leathlobhair (“descendant of Leathlobhar”). US census rank 2,503.
Lawlor Variant of Lawler. US census rank 6,034.
Leahy Reduced Anglicized form of Irish Ó Laochda (“descendant of Laochda”), a personal name derived from laoch (“hero”). US census rank 3,306.
Leland Shortened from McLeland, McClellan, from Irish Mac Giolla Fhaoláin, "son of servant of (Saint) Faolán (=Little Wolf)". US census rank 7,102.
Lennon From Irish Ó Leannáin and from Ó Lonáin (“descendant of Blackbird (Lonán)”). US census rank 3,406.
Linehan Reduced Anglicized form of Irish Ó Laidhghneáin (“descendant of Laidhghneán”), perhaps a personal name derived from a diminutive form of laidhghein (“snow-birth”). US census rank 9,380.
Logue Reduced Anglicized form of Irish Ó Maolaodhóg (“descendant of the servant of (Saint) Maodhóg”), a hypocoristic of aodh (“fire”). US census rank 4,433.
Lonergan Reduced Anglicized form of Irish Ó Longargáin (“descendant of Longargán”), a personal name based on lonn (“strong”) + garg (“fierce”) + -án. US census rank 8,875.
Looney Reduced Anglicized form of Irish Ó Luanaigh (“descendant of Luanach”), a personal name based on Middle Irish lúan (“light, warrior's halo, warrior”). US census rank 2,882.
Loughlin Reduced Anglicized form of Irish Ó Lachtnáin (“descendant of Lachtnán”), a diminutive of lachtna (“gray, dun”). US census rank 9,888.
Lydon Reduced Anglicized form of Irish Ó Loideáin (“descendant of Loideán”), a personal name of obscure origin. US census rank 8,116.
Macleod Anglicization of various Irish or Scottish Gaelic surnames. US census rank 4,393.
Madden Reduced Anglicized form of Irish Ó Madadháin (“descendant of Madadhán”), a diminutive of madadh (“dog”). US census rank 1,006.
Madigan Reduced Anglicized form of Irish Ó Madagáin (“descendant of Madagán”), a variant of the personal name Madadhán, which is from madadh (“dog”) + -án (“diminutive suffix”). US census rank 6,084.
Magee Variant of McGee. US census rank 1,305.
Mahaffey Anglicized form of Irish Mac Dhuibhshíthe (“son of Dhuibhshíth”), a personal name composed of the elements dubh (“black”) + síth (“peace”). US census rank 4,514.
Mahan Anglicized form of Irish Ó Macháin (“descendant of Machán”). US census rank 2,507.
Maher Reduced Anglicized form of Irish Ó Meachair (“descendant of Meachar”), a personal name meaning "fine", "majestic". US census rank 1,559.
Mahon Variant of Mahoney. US census rank 3,852.
Maley As an Irish surname, variant of Malley, see O'Malley. US census rank 7,538.
Malley As an Irish surname, shortened form of O'Malley. US census rank 8,786.
Malloy Variant of Molloy. US census rank 2,211.
Maloney Anglicized form of Irish Ó Maol Dhomhnaigh (“descendant of the devotee of Sunday”), from maol (“devotee”) and Domhnach (“Sunday”). US census rank 1,139.
Mangan Reduced Anglicized form of Irish Ó Mongáin (“descendant of Mongán”), a personal name derived from a diminutive form of mongach (“maned, long-haired”). US census rank 5,907.
Markey Reduced Anglicized form of Irish Ó Marcaigh (“descendant of Marcach”), a byname from marcach (“rider, horseman, cavalryman”). US census rank 6,682.
Maughan Variant of Mahan. US census rank 8,745.
McAbee Anglicized spelling of Irish Mac an Beatha (“son of life”), from beatha (“life”), originally a term denoting a monk, but later used as a personal name. US census rank 8,566.
McAfee Anglicized form of Irish and Scottish Gaelic Mac Dhuibhshíthe (“son of Dhuibhshít”), a personal name composed of dubh (“black”) + síth (“peace”). US census rank 2,979.
McAlpine Anglicized form of Irish Mac Ailpín and Scottish Gaelic Mac Ailpein (“son of Ailpean”), a personal name derived from a diminutive of ailp (“lump; stout person”). US census rank 8,540.
McAnally Variant of McNally. US census rank 8,277.
McArdle Anglicized form of Scottish Gaelic and Irish Mac Ardail, Mac Ardghail (“son of Ardal”), a personal name composed of the elements ard (“high”) + gal (“valor”). US census rank 6,251.
McAtee Anglicized spelling of Irish Mac an tSaoi (“son of the sage”), from saoi (“sage”). US census rank 7,025.
McAuley Northern Irish variant of McCauley. US census rank 7,942.
McAuliffe Anglicized form of Irish Mac Amhlaoibh (“son of Amhlaoibh”), a Gaelicized form of the Old Norse personal name Óláfr. US census rank 5,863.
McAvoy Northern Irish variant of McEvoy. US census rank 6,912.
McCabe A common spelling variant of MacCabe, anglicized form of Irish Mac Cába. US census rank 1,167.
McCafferty Anglicized form of Irish Mac Eachmharcaigh (“son of Eachmharcach”), a personal name composed of the elements each (“horse”) + marcach (“rider, knight”). US census rank 6,722.
McCaffrey Anglicized form of Northern Irish Mac Gafraidh (“son of Gafradh”), a Gaelicized form of the personal name Godfrey. US census rank 4,303.
McCain From the Irish variant of McKean. US census rank 1,985.
McCandless Anglicized form of Irish Mac Cuindlis (“son of Cuindleas”). US census rank 6,620.
McCann Anglicized form of Irish Mac Cana (“son of Cana”), a nickname from cana (“wolf cub”). US census rank 1,009.
McCants Variant of McCance. US census rank 5,520.
McCarley Anglicized form of Irish Mac Fhearghaile (“son of Fhearghal”), a personal name composed of the elements fear (“man”) and gal (“ardor, valor”). US census rank 8,655.
McCarroll Anglicized form of Irish Mac Cearbhaill (“son of Cearbhall”), a personal name of uncertain origin. US census rank 9,948.
McCarron Anglicized form of Irish Mac Cearáin, variant of Mac Ciaráin (“son of Ciarán”). US census rank 9,538.
McCaslin Irish variant of McCausland. US census rank 7,233.
McCauley Anglicized form of Irish and Scottish Gaelic Mac Amhalghaidh (“son of Amhalghadh”), a personal name of uncertain origin. US census rank 1,505.
McClanahan Anglicized form of Scottish Gaelic and Irish Mac Leanacháin (“son of Leanachán”), a personal name which ultimately derives from leann (“cloak, mantle”). US census rank 3,697.
McClary Variant of McCleary. US census rank 5,952.
McCleary Anglicized form of Irish Mac an Chléirigh (“son of the cleric”), from cléireach (“clerk, cleric”). US census rank 5,418.
McClellan Anglicized form of Scottish Gaelic Mac Gille Fhaolain and Irish Mac Giolla Fhaoláin (“son of the servant of Faolán”). US census rank 1,420.
McClelland Northern Irish variant of McClellan. US census rank 2,622.
McClendon Variant of McClinton. US census rank 1,943.
McClintock Anglicized form of Irish Mac Giolla Fhionntóg and Scottish Gaelic Mac Gille Fhionndaig (“son of the servant of (Saint) Finndag”). US census rank 4,056.
McClinton Anglicized form of Irish Mac Giolla Fhionntáin (“son of the servant of (Saint) Fintán”), a personal name which derives from a hypocoristic form of fionn (“white”). US census rank 5,792.
McCloskey From Irish Mac Bhloscaidh. US census rank 3,345.
McCluskey See McCloskey. US census rank 5,525.
McCollough Variant of McCullough. US census rank 7,796.
McCollum Anglicized form of Irish Mac Coluim (“son of Colum”). US census rank 1,850.
McComas Anglicized form of Northern Irish Mac Thómais (“son of Thomas”). US census rank 7,062.
McCool US census rank 4,815.
McCord Anglicized form of Northern Irish and Scottish Gaelic Mac Cuairt or Mac Cuarta, meaning "son of a journey," from mac + cuairt. US census rank 2,075.
McCorkle Anglicized form of Irish and Scottish Gaelic Mac Thorcaill. US census rank 4,336.
McCormack Variant of McCormick. US census rank 2,095.
McCourt Variant of McCord. US census rank 8,206.
McCown Variant of McCowan or McCune. US census rank 6,874.
McCracken Northern Irish and Scottish Gaelic surname, Anglicized form of Scottish Gaelic Mac Reachtain, a variant of Mac Neachtain (see McNaughton). US census rank 1,939.
McCrary Variant of McCreary. US census rank 3,044.
McCraw Ultimately a variant of McGrath. US census rank 6,220.
McCready Anglicized form of Irish and Scottish Gaelic Mac Riada (“son of Riada”), a byname meaning "expert", "trained". US census rank 7,964.
McCreary Anglicized form of Scottish Gaelic and Irish Mac Ruaidhrí (“son of Ruaidhrí”), a personal name composed of the elements ruadh (“red”) + rí (“king”). US census rank 4,307.
McCrory Anglicized form of Northern Irish Mac Ruaidhrí (“son of Ruaidhrí”), a personal name composed of the elements ruadh (“red”) + rí (“king”). US census rank 6,090.
McCulloch From the Scottish Gaelic variant of McCullough. US census rank 4,491.
McCune Anglicized form of Irish Mac Eoghain. US census rank 3,712.
McCurdy Anglicized form of Irish and Scottish Gaelic Mac Mhuircheartaigh (“son of Muircheartach”), a personal named based on muir (“sea”) + ceartach (“ruler”). US census rank 2,932.
McCurry Variant of McCorry or McMurray. US census rank 4,913.
McCutchen Variant of McCutcheon. US census rank 8,596.
McCutcheon Anglicized form of Northern Irish and Scottish Gaelic Mac Uisdein (“son of Uisdean”), a Gaelicized form of Old French Huchon, a hypocoristic form of Hughe (“Hugh”). US census rank 3,977.
McDade Anglicized form of Irish Mac Daibhéid, a surname meaning "son of David". US census rank 5,057.
McDermott Anglicized form of Irish Mac Diarmada (“son of Diarmaid”). US census rank 1,157.
McDevitt Anglicized form of Irish Mac Daibhéid (“son of David”). US census rank 4,972.
McDonnell Anglicized form of Irish Mac Dhomhnuill (“son of Donald”). US census rank 2,546.
McDuffie Anglicized form of Irish and Scottish Gaelic Mac Duibshíthe (“son of Duibshíth”) a personal name composed of the elements dubh (“black”) + síth (“peace”). US census rank 3,613.
McEachern Anglicized form of Irish and Scottish Gaelic Mac Eichthigheirn (“son of Eichthigearn”), a personal name formed by each (“horse”) + tighearna (“lord”). US census rank 8,394.
McElhaney Variant of McElhinney. US census rank 8,566.
McElroy Anglicized form of Irish Mac Giolla Ruaidh (“son of the red-haired lad”). US census rank 1,479.
McElwee Anglicized form of Irish Mac Giolla Bhuidhe (“son of the yellow-haired lad”). US census rank 8,946.
McEvoy Anglicized form of Scottish Gaelic Mac Giolla Bhuidhe (“son of the yellow-haired lad”) and Irish Mac Fhíodhbhuidhe. US census rank 5,803.
McFadden Anglicized form of Scottish Gaelic MacPhaidein and Irish Mac Pháidín. US census rank 1,125.
McFall Variant of McPhail. US census rank 4,794.
McGann Variant of McCann. US census rank 8,279.
McGarry Anglicized form of Irish and Scottish Gaelic Mac Fhearadhaigh (“son of Fhearadhach”), a personal name meaning "strong", "brave", from fear (“man”). US census rank 4,926.
McGarvey Anglicized form of Irish and Scottish Gaelic Mac Gairbhshíth (“son of Gairbhshíth”), a personal name composed of the elements garbh (“rough”) + síth (“peace”). US census rank 8,128.
McGehee Variant of McGaughey. US census rank 6,082.
McGhee Variant of McGee. US census rank 1,508.
McGinley Anglicized form of Irish Mac Fhionnghaile (“son of Fionnghal”), a personal name composed of the elements fionn (“fair”) + gal (“valor”). US census rank 5,140.
McGinn Anglicized form of Irish Mac Finn (“son of Fionn”), a byname from fionn (“white”). US census rank 5,872.
McGinnis Anglicized from Irish Mac Aonghusa and Scottish Gaelic MacAonghais. US census rank 1,346.
McGinty Anglicized form of Irish Mac Fhionnachtaigh (“son of Fionnachtach”), a variant of the personal name Fionnshneachtach. US census rank 5,672.
McGlone Anglicized form of Irish Mac Giolla Éoin (“son of the servant of (saint) John”). US census rank 9,257.
McGlothlin Variant of McLaughlin. US census rank 8,508.
McGlynn Anglicized form of Irish Mac Fhloinn, from a personal name derived from flann (“blood-red”). US census rank 7,820.
McGough Anglicized form of Irish Mac Eochadha. US census rank 6,614.
McGovern Anglicized form of Irish and Scottish Gaelic Mac Samhradháin (“son of Samhradhán”), diminutive of samhradh (“summer”). US census rank 2,164.
McGowan Anglicized form of Scottish Gaelic Mac a' Ghobhainn and Irish Mac Gabhann (“son of the smith”). US census rank 1,080.
McGrath Anglicized form of Irish Mac Craith, perhaps a variant of Mac Raith (“son of Rath”), a byname from rath (“abundance, prosperity”). US census rank 1,019.
McGuinness Variant of McGinnis. US census rank 7,329.
McHale Anglicized form of Irish mac céile (“son of the companion”) or, alternatively, from Irish Mac Haol (“son of Haol”), a Gaelicized form of Howell. US census rank 5,536.
McHenry Anglicized form of Irish Mac Éinrí, a patronymic from a Gaelicized form of the personal name Henry. US census rank 3,175.
McInerney Anglicized form of Irish Mac an Airchinnig (“son of the erenagh”). US census rank 7,298.
McIver Anglicized form of Irish and Scottish Gaelic Mac Íomhair (“son of Íomhar”), Gaelic adaptation of the Old Norse name Ívarr. US census rank 6,287.
McKeever Anglicized form of Irish Mac Íomhair. US census rank 4,867.
McKelvey Anglicized form of Irish Mac Giolla Bhuidhe. US census rank 4,973.
McKeon From Irish Mac Eoghain, Mac Eoin. US census rank 4,856.
McKibben Anglicized form of Irish Mac Fhibín (“son of Fibín”), a pet form of Philip. US census rank 7,687.
McLane Variant of McLean. US census rank 6,050.
McLemore Anglicized form of Irish Mac Giolla Mhuire (“son of the servant of Mary”). US census rank 3,370.
McLendon Variant of McClinton. US census rank 4,244.
McLoughlin Variant of McLaughlin. US census rank 7,041.
McMahan Variant of McMahon. US census rank 2,608.
McManus Anglicized form of Irish Mac Mághnais (“son of Magnus”). US census rank 1,546.
McMinn Anglicized form of Irish and Scottish Gaelic Mac Méinn. US census rank 6,940.
McMullen From the Irish variant of McMillan. US census rank 1,795.
McMullin From the Irish variant of McMillan. US census rank 6,504.
McMurray Anglicized form of Irish Mac Muireadhaigh (“son of the seafarer”). US census rank 3,652.
McNabb Anglicized form of Irish and Scottish Gaelic Mac an Abadh (“son of the abbot”). US census rank 3,667.
McNally Anglicized form of Irish Mac Con Allaidh (“son of the wild hound”), from cú allaid (“wild hound, wild dog”). US census rank 2,263.
McNamara From Irish Mac Conmara. US census rank 1,334.
McNamee Anglicized form of Irish Mac Conmidhe, a patronymic from the personal name Cú Mhidhe (“hound of Meath”). US census rank 5,842.
McNaughton From the Irish and Scottish Gaelic surname, Anglicized form of Mac Neachtain, a patronymic surname from the personal name Neachtan. US census rank 7,529.
McNeal Variant of McNeil. US census rank 1,780.
McNeely Anglicized form of Scottish Gaelic and Northern Irish Mac an Fhilidh (“son of the poet”), from fili (“poet, seer”). US census rank 3,314.
McNeil Anglicized form of Irish and Scottish Gaelic Mac Néill (“son of Níall”). US census rank 1,059.
McNew Apparently an altered spelling of an unidentified Scottish or Irish surname. US census rank 7,580.
McNulty Anglicized form of Irish Mac an Ultaigh (“son of the Ulsterman”), from Ultach (“Ulsterman”). US census rank 2,653.
McPeak As an Irish and Scottish surname, Anglicized form of Northern Irish Mac Péice (“son of Péic”), of non-Celtic but obscure origin. US census rank 9,263.
McPhail Anglicization of the Scottish Gaelic Mac Phàil and Irish Mac Phóil, both meaning "son of Paul". US census rank 6,397.
McQuade Variant of McQuaid. US census rank 7,704.
McQueen As a Scottish Gaelic and Irish surname, from Mac Shuibhne (“son of Suibhne”), a byname meaning "pleasant." See McSweeney. US census rank 1,825.
McReynolds Anglicized form of Northern Irish Mac Raghnaill (“son of Reynold”), with the redundant patronymic suffix -s. US census rank 4,780.
McShane Anglicized form of Irish Mac Seáin (“son of Seán”). US census rank 6,537.
McSweeney Anglicized form of Irish Mac Suibhne. US census rank 8,581.
Meagher Variant of Maher or Meager. US census rank 6,015.
Meehan Reduced Anglicized form of Irish Ó Miadhacháin (“descendant of Miadachán”), a diminutive of miadhach (“honorable”). US census rank 2,485.
Milligan From Irish Ó Maolagáin (“descendant of Maolagán”). US census rank 1,619.
Milliken Variant of Milligan. US census rank 6,132.
Molloy Reduced Anglicized form of Irish Ó Maolmhuaidh (“descendant of Maolmhuadh”), a personal name composed of maol (“chieftain”) + muadh (“noble, big”). US census rank 4,891.
Monahan An anglicization of Irish Ó Manacháin, commonly anglicized as Monaghan. US census rank 2,435.
Mooney Reduced Anglicized form of Irish Ó Maonaigh (“descendant of Maonach”), a personal name derived from maoineach (“rich, wealthy; precious, beloved”). US census rank 1,082.
Moriarty From Irish Ó Muircheartaigh (“descendant of Muircheartach”), a name from muir (“sea”) + ceardaí (“craftsman”). US census rank 3,567.
Moynihan Anglicized form of Irish Ó Muimhneacháin (“descendant of Muimhneachán”), a diminutive of Muimhneach (“Munsterman”). US census rank 7,674.
Mulcahy Reduced Anglicized form of Irish Ó Maolchathaigh (“descendant of the devotee of (Saint) Cathach”), a byname from cathachyss (“warlike”). US census rank 5,216.
Muldoon From Irish Ó Maoldúin (“descendant of Maoldúin”), from Ó + Maoldúin. US census rank 8,018.
Mulholland Irish Ó Maolchalann (“descendant of Maolchalann”). US census rank 5,559.
Mulkey Variant of Mulcahy. US census rank 6,050.
Mullaney Reduced Anglicized form of Irish Ó Maoilsheanaigh (“descendant of the devotee of (Saint) Seanach”). US census rank 8,090.
Mulligan Reduced Anglicized form of Irish Ó Maolagáin, from maolagán (“person with cropped hair”), from maol (“bald”). US census rank 2,495.
Mulvaney Anglicized form of Irish Ó Maoilmheana (“descendant of the chieftain of the Main river”). US census rank 9,628.
Mulvey Reduced Anglicized form of Irish Ó Maoilmhiadhaigh (“descendant of Maoilmhiadhach”). US census rank 8,453.
Neeley Reduced form of McNeeley. US census rank 3,944.
Neill Variant spelling of Neil, anglicized form of Irish Niall. US census rank 3,997.
Noonan Anglicization of Irish Ó hIonmhaineáin, from Ionmhaineán, a given name derived from the diminutive of Ionmhain (“beloved, dear”). US census rank 2,765.
O'Grady Anglicized form of Irish Ó Gráda (“descendant of Gráda”), a name meaning "noble." Compare Grady. US census rank 4,834.
O'Halloran Variant of Halloran. US census rank 9,462.
O'Hara Anglicization of Irish Ó hEaghra. US census rank 1,671.
O'Hare Anglicized form of Irish Ó hAichir (“descendant of Aichear”), a byname from aichear (“sharp, keen”). US census rank 6,455.
O'Keefe Anglicized form of Irish Ó Caoimh (“descendant of Caomh”), a personal name based on caomh (“gentle”). US census rank 2,100.
O'Leary From Irish Ó Laoghaire. US census rank 1,607.
O'Loughlin See Loughlin. US census rank 9,651.
O'Malley Anglicization of the Irish surname Ó Máille meaning "from/of Umaill". US census rank 2,045.
O'Mara A variant of O'Meara, from Irish Ó Meadhra (“descendant of Meadhair”). US census rank 7,444.
O'Meara Anglicized form of Irish Ó Meadhra (“descendant of Meadhair”), a byname from meadhair, variant of meidhir (“mirth, merriment”). US census rank 6,676.
O'Neil See O'Neill. US census rank 1,230.
O'Quinn Anglicized form of Irish Ó Coinn (“descendant of Conn”). US census rank 6,285.
O'Reilly A patronymic from Reilly. US census rank 2,913.
O'Rourke Anglicized form of Irish Ó Ruairc (“descendant of Ruarc”), a Gaelicized form of the Old Norse personal name Hrórekr (“Roderick”). US census rank 2,197.
O'Shaughnessy From Irish Ó Seachnasaigh. US census rank 9,396.
O'Shea Anglicization of the Irish surname Ó Séaghdha. US census rank 3,366.
O'Sullivan From Irish Ó Súilleabháin. US census rank 2,941.
Partlow Either a reduced form of McPartlow, a surname of Irish origin, or an Americanized form of German Bartlau. US census rank 9,273.
Pendergast Variant of Prendergast. US census rank 9,963.
Pendergrass Variant of Prendergast. US census rank 4,422.
Prendergast From the Irish and Welsh surname, perhaps derived from a now lost settlement in Flanders called Brontegeest. US census rank 5,962.
Quigley Reduced Anglicized form of Irish Ó Coigligh. US census rank 2,154.
Quinlan From Irish Ó Caoinleáin, a reduced form of Ó Caoindealbháin (“descendant of Caoindealbhán”), a personal name from caoin (“delicate, refined”) + dealbh (“shape”) + -án. US census rank 3,509.
Rafferty Anglicized form of Irish Ó Rabhartaigh (“descendants of Rabhartach”), a personal name derived from rabharta (“flood, tide”). US census rank 3,851.
Rainey Reduced Anglicized form of Irish Ó Raighne (“descendant of Raighne”), a Gaelicized form of the Old Norse personal name Rognvaldr. US census rank 1,561.
Raney Variant of Rainey. US census rank 4,167.
Reagan Anglicized from Irish Gaelic Ó Riagáin (“descendant of Riagán”), a personal name possibly derived from ríodhgach (“impulsive, furious”), an alternative form of ríogach. US census rank 2,331.
Reidy Reduced Anglicized form of Irish Ó Riada (“descendant of Riada”), a personal name perhaps meaning "drover". US census rank 7,916.
Rooney Anglicized from Irish Ó Ruanaidh (“descendant of a person named Champion”). US census rank 2,167.
Rowan Anglicized from the Irish saints' name Ruadhán (“little red one”), or as a surname from Ó Ruadháin (“descendant of Ruadhán”). US census rank 2,626.
Scanlan Variant of Scanlon. US census rank 6,175.
Scanlon Reduced Anglicized form of Irish Ó Scannláin (“descendant of Scannlán”), a personal name derived from a diminutive of Scannal. US census rank 3,116.
Scully Reduced Anglicized spelling of Irish Ó Scolaidhe. US census rank 4,023.
Shanahan Reduced Anglicized form of Irish Ó Seanacháin. US census rank 4,078.
Shane Anglicized form of the Northern Irish pronunciation of Irish Seán, from Old French Jehan, from Latin Johannes, variant of Ioannes, from Koine Greek Ἰωάννης. US census rank 5,101.
Shanley Reduced Anglicized form of Irish Mac Seanlaoich (“son of Seanlaoch”), a personal name composed of the elements sean (“old”) + laoch (“hero, champion”). US census rank 7,908.
Sharkey Reduced Anglicized form of Irish Ó Searcaigh (“descendant of Searcach”), from searcach (“beloved”). US census rank 4,256.
Shay Variant of Shea, from Irish Ó Séaghdha. US census rank 3,818.
Shea Anglicized from Irish Ó Séaghdha. US census rank 1,081.
Shealy Reduced form of O'Shealy, an Anglicized form of Irish Ó Sealbhaig (“descendant of Sealbhach”), a byname from the adjective sealbhach (“wealthy”). US census rank 7,381.
Sheehan Reduced Anglicized form of Irish Ó Síodhacháin (“descendant of Síodhachán”), a personal name derived from a diminutive of síodhach (“peaceful”). US census rank 1,331.
Sheehy Reduced Anglicized form of Irish Ó Síthigh (“descendant of Sítheach”), a byname from sítheach (“peaceful”). US census rank 6,977.
Sheridan As a surname, from Irish Ó Sirideáin. US census rank 1,627.
Skelly Variant of Scally. US census rank 7,974.
Slattery Reduced Anglicized form of Irish Ó Slatara (“descendant of Slatra”), a byname meaning "strong, robust, bold". US census rank 4,087.
Slavin Reduced Anglicized form of Irish Ó Sléibhín (“descendant of Sléibhín”), a personal name probably derived from a diminutive of sliabh (“mountain”). US census rank 8,760.
Swinney Variant of Sweeney. US census rank 7,207.
Talley Reduced Anglicized form of Irish Ó Taithligh (“descendant of Taithleach”), a byname from taithleach (“appeasement, pacification”). US census rank 1,210.
Teague From the Irish first name Tadhg. US census rank 1,509.
Tierney Anglicized from Irish Gaelic Ó Tiarnaigh "descendant of Tiarnach", a diminutive of tiarna (“lord, master”). US census rank 2,656.
Tinney Reduced Anglicized form of Irish Ó tSionnaigh (“descendant of Sionnach”), a personal name based on sionnach (“fox”). US census rank 9,527.
Toland Reduced Anglicized form of Irish Ó Tuathaláin (“descendant of Tuathalán”), a pet form of the personal name Tuathal. US census rank 7,403.
Toomey Reduced Anglicized form of Irish Ó Tuama (“descendant of Tuaim”), a personal name apparently derived from tuaim (“burial mound”). US census rank 4,796.
Trainor Reduced Anglicized form of Irish Mac Thréinfhir (“son of Thréinfhear”) a personal name composed of the elements tréan (“strong”) + fear (“man”). US census rank 5,112.
Turley Reduced Anglicized form of Irish Mac Toirdealbhaigh (“son of Toirdealbhach”). US census rank 3,411.
Twomey Variant of Toomey. US census rank 9,859.
Warnock Reduced Anglicized form of Irish and Scottish Gaelic Mac Giolla Mhearnóg (“son of the servant of (Saint) Mearnóg”), the patron saint of Kilmarnock. US census rank 6,628.
Whalen Variant of Whelan. US census rank 1,515.
Whelan Reduced Anglicized form of Irish Ó Faoláin (“descendant of Faolán”), a hypocoristic form of faol (“wolf”). US census rank 3,162.

Rarer in the US census 670

Abee Reduced form of McAbee. US census rank 33,336.
Aherne Variant of Ahern. US census rank 72,473.
Bligh As an Irish and Manx surname, from Ó Blighe (“descendant of Blighe”), probably Gaelicized from Old Norse Blígr, from blígja (“to gaze, stare”). US census rank 32,616.
Bohanan Variant of Bohannon. US census rank 15,413.
Bohannan Variant of Bohannon. US census rank 16,162.
Bohanon Variant of Bohannon. US census rank 16,290.
Boyne From Irish Bóinn. US census rank 28,854.
Branagan Variant of Brannigan. US census rank 36,891.
Braniff Reduced Anglicized form of Irish Ó Branduibh (“descendant of Brandubh”), a personal name composed of the elements bran (“raven”) + dubh (“black”). US census rank 39,170.
Brannigan Reduced Anglicized form of Irish Ó Branagáin (“descendant of Branagán”), a personal name derived from a hypocoristic form of bran (“raven”). US census rank 18,513.
Brannock Irish habitational surname from the town of Brecon, in Wales. US census rank 18,832.
Branon Variant of Brennan. US census rank 41,393.
Brazzle Variant spelling of Brazil. US census rank 38,883.
Bree Reduced Anglicized form of Irish Ó Breaghaigh. US census rank 34,023.
Briody Reduced Anglicized form of Irish Ó Bruaideadha (“descendant of Bruaided”). US census rank 38,939.
Brunty Variant of Prunty. US census rank 39,885.
Cafferty Reduced form of McCafferty. US census rank 29,943.
Caffrey Reduced form of McCaffrey. US census rank 10,518.
Cagney Reduced Anglicized form of Irish Ó Caingnigh (“descendant of Caingneach”), a byname from caingneach (“troublesome”). US census rank 37,363.
Cahalan Reduced Anglicized form of Irish Ó Cathaláin (“son of Cathalán”). US census rank 25,434.
Cahalane Reduced Anglicized form of Irish Ó Cathaláin (“descendant of Cathalán”), a diminutive of the personal name Cathal. US census rank 64,041.
Calahan Variant of Callahan. US census rank 14,921.
Calkin Variant of Culkin. US census rank 41,101.
Callaham Variant of Callahan. US census rank 23,249.
Callanan Reduced Anglicized form of Irish Ó Callanáin (“descendant of Callanán”), a personal name of unclear origin. US census rank 15,372.
Calnan Reduced form of Callanan. US census rank 29,804.
Canan Variant of Cannan. US census rank 35,675.
Canavan Reduced Anglicized form of Irish Ó Ceanndubháin (“descendant of Ceanndubhán”). US census rank 10,184.
Cannan Reduced Anglicized form of Irish Ó Canann (“descendant of Canán”), a personal name derived from cano (“wolf cub”). US census rank 29,674.
Carlan Variant of Carolan. US census rank 46,793.
Carnathan Variant of Carnahan. US census rank 41,101.
Carolan Reduced Anglicized form of Irish Ó Cearbhalláin (“descendant of Cearbhallán”), a diminutive of Cearbhall (“Carroll”). US census rank 13,320.
Carraher Reduced Anglicized form of Irish Mac Fhearchair (“son of Fearchar”), a personal name composed of the elements fear (“man”) + car (“dear, beloved”). US census rank 30,002.
Carrig Anglicized form of Irish Carraig, a topographic surname from carraig (“rock”). US census rank 35,441.
Casady Variant spelling of Cassidy. US census rank 21,766.
Casement Reduced Anglicized form of Irish Mac Asmuint (“son of Asmund”), a personal name derived from Old Norse Asmundr. US census rank 84,529.
Cassaday Variant of Cassidy. US census rank 36,981.
Casserly Reduced Anglicized form of Irish Ó Caisile, a variant of Ó Caiside, from which the surname Cassidy. US census rank 26,789.
Caughey Reduced Anglicized form of Irish Mac Eochadha (“son of Eochaidh”). US census rank 21,381.
Claffey Reduced Anglicized form of Irish Mac Fhlaithimh (“son of Flaitheamh”), a byname from flaitheamh (“prince, ruler”). US census rank 25,996.
Clancey Variant of Clancy. US census rank 30,686.
Clavin Reduced Anglicized form of Irish Mac Fhláimhín (“son of Flaithimhín”), a personal name from a diminutive of flaith (“prince, ruler”). US census rank 37,449.
Clery Variant of Cleary. US census rank 106,101.
Cloonan Reduced Anglicized form of Irish Ó Cluanáin (“descendant of Cluanán”), a personal name derived from a diminutive form of cluanach (“deceitful”). US census rank 28,052.
Coday Variant of Cody. US census rank 37,603.
Coggin Variant of Coogan. US census rank 16,353.
Coghlan Variant of Coughlin. US census rank 15,193.
Cogley Reduced Anglicized form of Irish Ó Coighligh. US census rank 24,658.
Cohea Variant of Cohee. US census rank 37,037.
Cohee Munster variant of Coffey. US census rank 18,879.
Cokley Variant of Coakley. US census rank 26,789.
Colbath Northern Irish variant of Galbraith. US census rank 40,048.
Colligan Variant of Colgan. US census rank 15,001.
Coltrain Variant of Coltrane. US census rank 35,964.
Coltrane Anglicized form of Irish Ó Coltaráin. US census rank 23,835.
Comiskey Reduced Americanized form of Irish Mac Cumascaigh. US census rank 19,694.
Conahan Anglicized form of Irish Ó Connachaín (“son of Connachán”). US census rank 44,477.
Concannon Reduced Anglicized form of Irish Ó Conceannainn (“descendant of Conceannann”). US census rank 13,928.
Condry Variant of Conroy. US census rank 34,057.
Conlan Reduced Anglicized form of Irish Ó Conalláin (“descendant of Conallán”), a diminutive of the personal name Conall. US census rank 14,867.
Conly Variant of Conley. US census rank 36,810.
Connelley Variant of Connelly. US census rank 38,228.
Connely Variant of Connelly. US census rank 32,025.
Connery Variant of Conroy. US census rank 18,212.
Conolly Variant of Connolly. US census rank 43,505.
Conran Reduced Anglicized form of Irish Ó Conaráin (“descendant of Conarán”), a pet form of the personal name Conaire. US census rank 40,598.
Conrey Variant of Conroy. US census rank 40,697.
Coogan Reduced Anglicized form of Irish Mac Cogadháin (“son of Cogadhán”), a diminutive from a reduced form of the personal name Cúchogaidh. US census rank 11,489.
Coonan Reduced Anglicized form of Irish Ó Cuanáin (“descendant of Cuanán”), a diminutive of the personal name Cuana. US census rank 38,482.
Corkern Variant of Corcoran. US census rank 31,903.
Corkery Reduced Anglicized form of Irish Ó Corcra (“descendant of Corcra”), a personal name derived from corcair (“purple”). US census rank 21,322.
Corkran Variant of Corcoran. US census rank 35,485.
Cormack From the Old Irish given name Cormac. US census rank 24,492.
Corr Irish, from Ó Corra (“descendant of Corra”), a personal name from corr (“spear”). US census rank 10,614.
Costigan Anglicized form of Irish Mac Oistigín (“son of Oistigín”), probably a Gaelicized form of the personal name Hodgkin. US census rank 12,466.
Costley Variant of Costello. US census rank 15,866.
Costlow Variant of Costello. US census rank 24,186.
Counihan Reduced Anglicized form of Irish Ó Cuanacháin (“descendant of Cuanachán”), a diminutive of the personal name Cuana. US census rank 35,485.
Craney Perhaps a shortened Anglicized form of Irish Mac Ciaráin (“son of Ciarán”), a personal name from ciar (“black”) + -án (“diminutive suffix”). US census rank 29,943.
Cranney Variant of Craney. US census rank 42,669.
Cranor Reduced Anglicized form of Irish Mac Thréinfhir (“son of Thréinfhear”) a personal name composed of the elements tréan (“strong”) + fear (“man”). US census rank 29,943.
Cravey Reduced form of McGreevy. US census rank 21,062.
Creagh Anglicized form of Irish Craobhach, an epithet of the O'Neill dynasty deriving from the adjective craobhach (“branched, branching”). US census rank 37,855.
Crean Reduced Anglicized form of Irish Ó Croidheáin (“descendant of Croidheán”), a byname derived from a diminutive of croidhe (“heart”). US census rank 19,411.
Creeden Variant of Creedon. US census rank 34,347.
Creedon Reduced Anglicized form of Irish Ó Críodáin (“descendant of Críodán”), a personal name of obscure origin. US census rank 20,298.
Creely Variant of Crilly. US census rank 55,400.
Creevy Reduced Anglicized form of Irish Ó Craobhaigh (“descendant of Craobhach”), a personal name deriving from craobhach (“branched, branching”). US census rank 87,019.
Cremin Variant of Crimmins or Kremen. US census rank 46,548.
Crilley Variant of Crilly. US census rank 40,855.
Crilly Reduced Anglicized form of Irish Mac Raghailligh (“son of Raghailleach”). US census rank 28,316.
Crimmins Reduced Anglicized form of Irish Ó Cruimín (“descendant of Cruimín”), a byname from a diminutive of crom (“bent, crooked”). US census rank 11,833.
Croak Variant of Croke. US census rank 36,981.
Croghan From Irish Cruachán. US census rank 21,675.
Croke Anglicized form of Irish Cróc. US census rank 23,219.
Cronan Variant of Cronin. US census rank 14,840.
Croney Shortened Anglicized form of Irish Mac Ruanaidh (“son of Rooney”) or Mac Raighne (“son of Reaney”). US census rank 28,469.
Crossan Reduced form of McCrossen, from Irish Mac an Chrosáin (“son of the satirist”), from crosán (“reciter”). US census rank 22,124.
Cryan Reduced Anglicized form of Irish Mac Ruaidhín (“son of Ruaidhín”), a personal name derived from a diminutive of ruadh (“red”). US census rank 30,718.
Culhane Reduced Anglicized form of Irish Ó Cathaláin (“descendant of Cathalán”), from the personal name Cathal + the diminutive suffix -án. US census rank 14,242.
Culkin Reduced Anglicized form of Irish Mac Uilcín (“son of Uilcín”), a double diminutive of the Gaelicized form of the personal name William. US census rank 35,441.
Culligan Anglicized from Irish Ó Cuilleagain (“descendant of Colgan”), a personal name derived from coll (“hazel tree”). US census rank 22,436.
Cullinan Reduced Anglicized form of Irish Ó Cuilleannáin (“descendant of Cuilleannán”), a personal name deriving from a diminutive form of cuileann (“holly”). US census rank 13,967.
Cullinane Variant of Cullinan. US census rank 20,034.
Culliton Reduced Anglicized form of Irish Ó Codlatáin (“descendant of Codlatán”), a nickname derived from codlatán (“sleeper, sleepy-head”). US census rank 37,174.
Cully Anglicized form of Irish Ó Colla (“descendant of Colla”), a personal name of unknown origin. US census rank 21,548.
Dacey Anglicized form of Irish Déiseach, a name for a member of a vassal community called Déise, a word of uncertain meaning and origin. US census rank 17,273.
Dade Anglicized from an Irish equivalent of David. US census rank 12,644.
Danahy Variant of Dennehy. US census rank 31,403.
Dargan Reduced Anglicized form of Irish Ó Deargáin (“descendant of Deargán”), a byname from dearg (“red”) + -án (“diminutive suffix”). US census rank 16,978.
Darragh Reduced Anglicized form of Irish Ó Dubhdarach (“descendant of Dubhdarach”), a personal name composed of the elements dubh (“black”) and darach, genitive of dair (“oak”). US census rank 21,219.
Davlin Variant of Devlin. US census rank 42,858.
Dawdy Variant of Dowd. US census rank 25,619.
Dealy Variant of Deeley. US census rank 38,660.
Deasy Variant of Dacey. US census rank 25,728.
Deeley Reduced Anglicized form of Irish Ó Duibhghiolla (“descendant of Duibhghiolla”), a personal name composed of the elements dubh (“black”) + giolla (“lad”). US census rank 36,150.
Dennehy Reduced Anglicized form of Irish Ó Duineachdha (“descendant of Duineachaidh”), a personal name whose first element is duine (“human being”). US census rank 16,566.
Devenney Variant of Devaney. US census rank 32,985.
Deviney A variant of Devaney. US census rank 31,863.
Devor Borrowed from Irish Ó Dabhoireann. US census rank 34,185.
Devoy Anglicized form of Irish Dubhuidhe, a personal name probably derived from dubh (“dark”) + buidhe (“sallow”). US census rank 32,900.
Diffley Reduced Anglicized form of Irish Ó Duibhghiolla (“descendant of Duibhgiolla”), a personal name composed of the elements dubh (“black”) and giolla (“lad”). US census rank 42,533.
Doheny Reduced Anglicized form of Irish Ó Dubhconna (“descendant of Dubhconna”), a personal name composed by the elements dubh (“black”) + Conna, a hypocoristic form of Colmán. US census rank 26,837.
Donaghey From Irish Domnach (“Sunday”) + each (“horse”). US census rank 40,323.
Donaghue Variant of Donahue. US census rank 40,048.
Donahey Variant of Donahue. US census rank 44,282.
Donaho Variant of Donahue. US census rank 37,718.
Donahoe Variant of Donahue. US census rank 10,080.
Donahoo Variant of Donahue. US census rank 17,588.
Donavan Variant of Donovan. US census rank 39,379.
Donlan Variant of Donlon. US census rank 20,921.
Donlon Reduced Anglicized form of Irish Ó Domhnalláin (“descendant of Domhnallán”), a diminutive of the personal name Domhnall. US census rank 12,492.
Donnan Reduced Anglicized form of Irish Ó Donnáin (“descendant of Donnán”), a personal name which derives from donn (“brown, brown-haired”) + -án (“diminutive suffix”). US census rank 30,557.
Donnellan Reduced Anglicized form of Irish Ó Domhnalláin (“descendant of Domhnallán”), a diminutive of the personal name Domhnall. US census rank 19,847.
Donohew Variant of Donoghue. US census rank 79,581.
Doonan Reduced Anglicized form of Irish Ó Dúnáin (“descendant of Dúnán”), a hypocoristic form of an unknown name beginning with the element dun (“fortress”). US census rank 22,647.
Dornan From the Irish surname, from Ó Duirnín, Ó Dornáin, possibly from dorn (“fist”). US census rank 24,443.
Dorney Reduced Anglicized form of Irish Ó Doirinne (“descendant of Doireann”), a personal name related to dodaire (“sullen, sulky”). US census rank 25,086.
Dowdall Irish habitational surname for someone who came from Dovedale, in Derbyshire. US census rank 40,048.
Doyne Variant of Dunn. US census rank 71,480.
Draughn Variant of Drohan. US census rank 14,018.
Draughon Variant of Drohan. US census rank 19,901.
Drawdy Anglicized form of Irish Ó Draoda, a rare Connacht name. US census rank 15,455.
Drennen Variant of Drennan. US census rank 13,334.
Drennon Variant of Drennan. US census rank 24,125.
Drinnon Variant of Drennan. US census rank 27,730.
Drohan Reduced Anglicized form of Irish Ó Druacháin (“descendant of Druachán”), a byname deriving from a diminutive of druach (“wise man”). US census rank 32,481.
Dromgoole US census rank 58,695.
Drumgoole Variant of Dromgoole. US census rank 37,718.
Duane Anglicized form of the Irish name Dubhán, from dubh (“black, dark”). US census rank 15,947.
Ducey Reduced Anglicized form of Irish Ó Dubhghusa (“descendant of Dubhghus”), a personal name composed of the elements dubh (“black”) + gus (“choice; vigor”). US census rank 21,686.
Duffin Reduced Anglicized form of Irish Ó Duibhfinn (“descendant of Dubhfionn”), a personal name composed of the elements dubh (“black”) + fionn (“fair, white”). US census rank 12,291.
Duignan Reduced Anglicized form of Irish Ó Duibhgeannáin (“descendant of Duibhgeannán”). US census rank 40,855.
Dunlavey Variant of Dunleavy. US census rank 36,198.
Dunleavy Reduced Anglicized form of Irish Mac Duinnshléibhe (“son of Donn Sléibhe”). US census rank 12,140.
Dunlevy Variant of Dunleavy. US census rank 24,236.
Dunnagan Variant of Donegan. US census rank 37,174.
Dunworth Anglicized form of Irish Ó Donndubhartaigh (“descendant of Donndubhartach”). US census rank 45,684.
Durney Variant of Dorney. US census rank 37,363.
Durnin Reduced Anglicized form of Irish Ó Duirnín (“descendant of Duirnín”). US census rank 33,611.
Earney Shortened form of McInerney. US census rank 42,249.
Faherty Reduced Anglicized form of Irish Ó Fatharthaig (“descendant of Fathartach”), a personal name ultimately derived from foghar (“sound”). US census rank 18,405.
Fahie Variant of Fahey. US census rank 44,906.
Fahy Variant of Fahey. US census rank 12,668.
Falin Variant of Fallon. US census rank 39,424.
Falvey Reduced Anglicized form of Irish Ó Fáilbhe (“descendant of Fáilbhe”), a personal name derived from fáilbhe (“pleasant, merry, lively”). US census rank 15,997.
Faraday Anglicized from Irish Ó Fearadaigh. US census rank 82,881.
Farry Variant of Ferry. US census rank 42,249.
Fatheree Possibly a shortened Americanized form of Irish Ó Fiachra, which is found as Feighery in Ireland. US census rank 39,536.
Faughnan Reduced Anglicized form of Irish Ó Fachtnáin (“descendant of Fachtnán”), a diminutive of the personal name Fachtna. US census rank 39,490.
Feagans Borrowed from Irish Ó Faodhagain. US census rank 37,037.
Feehan Reduced Anglicized form of Irish Ó Fiacháin (“descendant of Fiachán”), a personal name from fiach (“raven”) + -án (“diminutive suffix”). US census rank 15,307.
Feeny Variant of Feeney. US census rank 45,381.
Fenlon Reduced Anglicized form of Irish Ó Fionnaláin (“descendant of Fionnalán”), a hypocoristic form of fionn (“fair, white”). US census rank 28,258.
Fennessey Variant of Fennessy. US census rank 41,648.
Fennessy Reduced Anglicized form of Irish Ó Fionnghusa (“descendant of Fionnghus”), a personal name based on fionn (“fair, white”) + gus (“vigor, force”). US census rank 26,837.
Ferrall Variant of Farrell. US census rank 40,983.
Ferrick Shortened Americanized form of Irish Mac Phiaraic (“son of Piers or Peter”). US census rank 28,625.
Finan Reduced Anglicized form of Irish Ó Fionnáin (“descendant of Fionnán”), a personal name which derives from the diminutive form of fionn (“fair, blond”). US census rank 14,772.
Finigan Variant of Finnegan. US census rank 41,826.
Finnigan Variant of Finnegan. US census rank 13,851.
Finucane Reduced Anglicized form of Irish Ó Fionnmhacáin (“descendant of Fionnmhacán”), a personal name composed by the elements fionn (“fair, white”) + macán. US census rank 28,526.
Flaharty Variant of Flaherty. US census rank 43,428.
Flanary Variant of Flannery. US census rank 14,205.
Flanery Variant of Flannery. US census rank 17,556.
Flannagan Variant of Flanagan. US census rank 21,415.
Flannigan Variant of Flanagan. US census rank 13,093.
Flattery Borrowed from Irish Ó Flaithre. US census rank 37,363.
Flavin Anglicized from Irish Ó Flaithimhín. US census rank 14,757.
Fogerty Variant of Fogarty. US census rank 30,403.
Foran Reduced Anglicized form of Irish Ó Fuartháin (“descendant of Fuarthán”), a personal name from fuar (“cold”). US census rank 10,326.
Furey Reduced Anglicized form of Irish Ó Fiúra, reduced form of Ó Fiodhabhra (“descendant of Fiodhabhra”). US census rank 10,931.
Gahagan Variant of Gavigan or Geoghegan. US census rank 16,531.
Gallegly Variant of Gallogly. US census rank 76,963.
Galleher Variant of Gallagher. US census rank 69,002.
Galligher Variant of Gallagher. US census rank 67,362.
Galliher Variant of Gallagher. US census rank 22,019.
Gallivan Variant of Galvin. US census rank 18,277.
Gallogly Reduced Anglicized form of Irish Mac an Ghallóglaigh (“son of the gallowglass”), from gallóglach (“gallowglass, Gaelic mercenary warrior”). US census rank 38,380.
Galway Anglicization of Irish Gaillimh, of uncertain meaning, said to mean "stony" (referring to the River Corrib). US census rank 56,914.
Gargan Reduced Anglicized form of Irish Ó Geargáin (“descendant of Geargán”), a personal name from a diminutive of gearg (“quail”). US census rank 37,267.
Garrigan Reduced Anglicized form of Irish Ó Geargáin (“descendant of Geargán”), a personal name which derives from the diminutive form of gearg (“quail”). US census rank 18,992.
Geoghegan Reduced Anglicized form of Irish Mag Eochagáin (“son of Eochagán”), a diminutive of Eochaidh. US census rank 16,706.
Gerety Variant of Geraghty. US census rank 38,228.
Gerrity Variant of Geraghty. US census rank 17,821.
Ghormley Variant of Gormley. US census rank 39,820.
Gilboy Reduced Anglicized form of Irish Ó Giolla Bhuidhe (“descendant of the blond lad”), from giolla (“lad”) and buidhe (“yellow”). US census rank 45,922.
Gildea Reduced Anglicized form of Irish Mac Giolla Dhé (“son of the servant of God”), from giolla (“boy, lad; attendant”) and Dia (“God”). US census rank 14,740.
Gilhooly Reduced Anglicized form of Irish Mac Giolla Ghuala (“son of the gluttonous lad”), from giolla (“boy, lad”) and guala (“gullet, gut”). US census rank 39,592.
Gillogly Variant of Gallogly. US census rank 45,684.
Gillooly Variant of Gilhooly. US census rank 37,075.
Gilpatrick Reduced Anglicized form of Irish Mac Giolla Phádraig (“son of the servant of (saint) Patrick”). US census rank 23,455.
Ginty Reduced form of McGinty. US census rank 39,333.
Glacken Variant of Glackin. US census rank 38,939.
Glackin Reduced Anglicized form of Irish Ó Glacáin, from a diminutive of glac (“grasp”). US census rank 35,148.
Glancy Variant of Clancy. US census rank 16,124.
Goffney Variant of Gaffney. US census rank 43,339.
Gogan Reduced Anglicized form of Irish Mac Cogadháin (“son of Cogadhán”). US census rank 32,654.
Goldrick Reduced form of McGoldrick. US census rank 40,749.
Gollaher Variant of Gallagher. US census rank 57,177.
Golliher Variant of Gallagher. US census rank 38,660.
Gookin Reduced Anglicized form of Irish Mac Guagáin. US census rank 38,417.
Granahan Reduced form of McGranahan. US census rank 44,135.
Greaney Reduced Anglicized form of Irish Ó Gráinne (“descendant of Gráinne”), a female personal name. US census rank 19,961.
Greenan Reduced Anglicized form of Irish Ó Grianáin (“descendant of Grianán”), a personal name derived from Irish grianán (“person of sunny disposition”). US census rank 30,686.
Griffee Variant of Griffey. US census rank 38,825.
Griffey Reduced Anglicized form of Irish Ó Gríobhtha (“descendant of Gríobhtha”), a personal name which derives from gríobh (“griffin”). US census rank 10,451.
Groarke Reduced Anglicized form of Irish Mag Ruairc (“son of Ruarc”), a variant of the personal name Ruadhrac, itself from Old Norse Hróðrekr. US census rank 146,495.
Guilfoyle Anglicized form of Irish Mac Giolla Phóil (“son of St. Paul's follower”). US census rank 16,454.
Guiney Reduced Anglicized form of Irish Mac Géibheannaigh (“son of Géibheannach”), a personal name derived from géibheannach (“fettered”). US census rank 30,002.
Hagarty Variant of Haggerty. US census rank 41,648.
Hainey Variant of Heaney. US census rank 34,389.
Halferty Reduced Anglicized form of Irish Ó hAilbheartaigh (“descendant of Ailbeartach”), a personal name probably derived from ilbeartach (“accomplished”). US census rank 40,800.
Halligan Reduced Anglicized form of Irish Ó hÁilleagáin (“descendant of Áilleagán”), a double diminutive of áille (“beauty”). US census rank 10,401.
Hallinan Reduced Anglicized form of Irish Ó hÁilgheanáin (“descendant of Áilgheanán”), a personal name from a diminutive of áilghean (“mild, gentle, soft”). US census rank 18,972.
Hallisey Reduced Anglicized form of Irish Ó hÁilgheasa (“descendant of Áilgheas”), a byname from áilgheas (“desire, craving”). US census rank 34,057.
Hallissey Variant of Hallisey. US census rank 106,589.
Halvey Reduced Anglicized form of Irish Ó hAilmich (“descendant of Ailmhac”), a byname meaning "noble-son". US census rank 115,151.
Hanaway Variant of Hanvey. US census rank 42,180.
Handlon Variant of Hanlon. US census rank 47,869.
Hanratty Reduced Anglicized form of Irish Ó hInreachtaigh (“descendant of Ionnrachtach”), a byname meaning "attacker". US census rank 24,589.
Hanvey Reduced Anglicized form of Irish Ó hAinbheith (“descendant of Ainbhioth”), a byname meaning "stormy". US census rank 21,898.
Haran A variant of Haren, or a reduced form of Hanrahan, both Irish surnames. US census rank 26,703.
Hargan Variant of Horgan. US census rank 51,779.
Harkin As an Irish surname, from Ó hEarcáin, "descendant of Earcán," from earc. US census rank 20,854.
Hartigan Reduced Anglicized form of Irish Ó hArtagáin (“descendant of Artagán”), from a double diminutive of art (“bear”). US census rank 11,321.
Haughey Reduced Anglicized form of Irish Ó hEochaidh (“descendant of Eochaid”). US census rank 17,942.
Haverty Reduced Anglicized form of Irish Ó hÁbhartaigh (“descendant of Ábhartach”), a personal name of unclear origin. US census rank 27,672.
Heekin Variant of Egan. US census rank 61,001.
Heeney Variant of Heaney. US census rank 37,907.
Hehir Reduced Anglicized form of Irish Ó hAichir (“descendant of Aichear”), a byname from aichear (“keen, sharp”). US census rank 39,643.
Heneghan Anglicized form of Irish Ó hEidhneacháin (“descendant of Eidhneachán”), a personal name of uncertain origin. US census rank 20,382.
Henehan Variant of Heneghan. US census rank 43,339.
Hennigan Variant of Heneghan. US census rank 11,426.
Herlihy Reduced Anglicized form of Irish Ó hIarfhlatha (“descendant of Iarfhlaith”), a personal name composed of the elements iarthar (“west”) + flaith (“lord”). US census rank 11,789.
Hernon Reduced Anglicized form of Irish Ó hIarnáin (“descendant of Iarnán”), possibly a diminutive of íarn (“iron”). US census rank 41,459.
Heslin Reduced Anglicized form of Irish Ó hEislin, a reduced form of Irish Ó hEisleanáin (“descendant of Eisleanán”). US census rank 21,791.
Hession Reduced Anglicized form of Irish Ó hOisín (“descendant of Oisín”), a personal name which derives from a diminutive form of os (“deer”). US census rank 19,472.
Hilferty Variant of Halferty. US census rank 60,717.
Holahan Variant of Houlihan. US census rank 36,629.
Holohan Variant of Houlihan. US census rank 35,561.
Horrigan Variant of Harrigan. US census rank 16,640.
Houlahan Variant of Houlihan. US census rank 65,358.
Hourigan Variant of Horgan. US census rank 21,643.
Hourihan Variant of Hanrahan. US census rank 27,268.
Hulvey Variant of Halvey. US census rank 38,660.
Karney Reduced form of McCarney. US census rank 35,096.
Keady Reduced Anglicized form of Irish Mac Céadaigh. US census rank 32,173.
Kealy Variant of Keeley. US census rank 28,052.
Keaney Possibly an Americanized form of Irish Ó Cianagh (“descendant of Cianach”), a byname from cian (“distant, long”). US census rank 25,839.
Keaveney Reduced Anglicized form of Irish Mac Géibheannaigh (“son of Géibheannach”), a nickname from géibheannach (“fettered”), from géibheann (“fetter”). US census rank 37,075.
Keaveny Variant of Keaveney. US census rank 40,598.
Keely Variant of Keeley. US census rank 16,783.
Kelliher Variant of Kelleher. US census rank 13,889.
Keneally Variant of Kenneally. US census rank 83,373.
Kenealy Variant of Kenneally. US census rank 32,900.
Kennady Variant of Kennedy. US census rank 79,118.
Kenneally Reduced Anglicized form of Irish Ó Cionnfhaolaidh (“descendant of Cionnfhaoladh”), a personal name composed of the elements ceann (“head”) + faol (“wolf”). US census rank 20,645.
Kennelly Variant of Kenneally. US census rank 12,232.
Keogh Variant of Keough. US census rank 10,874.
Kervin Variant of Kirwan. US census rank 27,242.
Kidney From a mistranslation of Irish Ó Dubháin (“descendant of Dubhán”) (directly rendered in English as Duane), a personal name from a diminutive of dubh (“black”). US census rank 23,772.
Kielty Anglicized form of Irish Ó Caoilte (“descendant of Caoilte”), a personal name probably based on caol (“slender”). US census rank 30,781.
Kiely Reduced Anglicized form of Irish Ó Cadhla (“descendant of Cadhla”), a byname from cadhla (“beautiful”). US census rank 10,758.
Kiggins Anglicized form of Irish Mac Uiginn (“son of the Viking”), from uiging (“Viking”). US census rank 26,208.
Kilbane Anglicized form of Irish Mac Giolla Bháin (“son of the fair-haired lad”), from giolla (“lad, boy”) and bán (“white, fair”). US census rank 26,016.
Kilcullen Anglicized form of Irish Mac Giolla Cuillin. US census rank 38,279.
Kilday Anglicized form of Irish Mac Giolla Dhé. US census rank 36,981.
Kildow Variant of Kilduff. US census rank 37,449.
Kilduff Reduced Anglicized form of Irish Mac Giolla Duibh (“son of the black-haired lad”), from giolla (“boy, lad”) and dubh (“black”). US census rank 20,463.
Killeen Reduced Anglicized form of Irish Ó Cillín. US census rank 10,109.
Kilroy Irish Mac Giolla Ruaidh. US census rank 12,731.
Kincannon Variant of Concannon. US census rank 25,867.
Kinnan Reduced Anglicized form of Irish Mac Fhionnáin (“son of Fionnán”), a diminutive of fionn (“fair, blond”) or of Ó Cianáin (“descendant of Cianán”). US census rank 36,891.
Kirlin Borrowed from Irish Ó Caireallain. US census rank 33,142.
Kirwan Anglicized form of Irish Ó Ciardhubháin (“descendant of Ciardhubhán”), a personal name composed of ciar (“dark”) + dubh (“black”) + the suffix -an. US census rank 13,050.
Kissane From Irish Ó Ciosáin. US census rank 24,212.
Kneafsey Reduced Anglicized form of Irish Ó Cnáimhsighe (“son of Cnáimhseach”), a rare female given name. US census rank 140,525.
Kough Variant of Keough. US census rank 40,219.
Kyne Variant of Coyne. US census rank 37,769.
Laffey Variant of Claffey. US census rank 20,429.
Laffin Variant of Lavin. US census rank 29,787.
Lahey Variant spelling of Leahy. US census rank 12,211.
Lanigan Reduced Anglicized form of Irish Ó Lonagáin (“descendant of Lonagán”), apparently a double diminutive of lon (“blackbird”), but possibly a variant of Flanagan. US census rank 13,017.
Lannan Variant of Lennon. US census rank 26,068.
Lannen Variant of Lennon. US census rank 40,000.
Laughery Variant of Loughrey. US census rank 26,068.
Laverty Variant of Lafferty. US census rank 11,847.
Leahey Variant spelling of Leahy. US census rank 23,003.
Leamy Reduced Anglicized form of Irish Ó Laomdha. US census rank 36,772.
Lehan Variant of Lehane. US census rank 30,686.
Lehane Reduced Anglicized form of Irish Ó Liatháin (“descendant of Liathán”), a diminutive of liath (“gray”). US census rank 32,724.
Lehigh Variant of Leahy. US census rank 36,981.
Lenahan Reduced Anglicized form of Irish Ó Leanacháin (“descendant of Leanachán”), probably derived from leann (“cloak”) and not from léanach (“sorrowful”). US census rank 12,554.
Leneghan Variant of Lenahan. US census rank 148,665.
Lenehan Variant of Lenahan. US census rank 36,244.
Linsky Variant of Lynskey or Linski. US census rank 34,101.
Loghry Variant of Loughrey. US census rank 39,424.
Lohan An anglicization of Irish Ó Leocháin, from Middle Irish uí Leochain, from Old Irish úa Lothcháin. US census rank 44,611.
Looby Reduced Anglicized form of Irish Ó Lúbaigh (“descendant of Lúbach”), a byname originally applied to a cunning person, from lúbach (“looped, coiled; crafty, tricky”). US census rank 26,628.
Loonan Reduced Anglicized form of Irish Ó Luanáin (“descendant of Luanán”). US census rank 114,613.
Loughery Variant of Loughrey. US census rank 40,270.
Loughran Reduced Anglicized form of Irish Ó Luchaireáin (“descendant of Luchaireán”), a personal name derived from a diminutive form of luchair (“radiant, glittering”). US census rank 11,811.
Loughrey Reduced Anglicized form of Irish Ó Luachra (“descendant of Luachra”), a personal name derived from luachair (“light”). US census rank 32,025.
Loughry Variant of Loughrey. US census rank 28,736.
Lucey Reduced Anglicized form of Irish Ó Luasaigh, an altered form of Mac Cluasaigh (“son of Cluasach”), a nickname derived from cluas (“ear”). US census rank 11,334.
Lunan Variant of Loonan. US census rank 85,336.
Lunney Variant of Looney. US census rank 34,185.
Lynott Anglicized form of Irish Liónoid, a Gaelicization of a Norman family. US census rank 36,150.
Lynskey Reduced Anglicized form of Irish Ó Loingscigh, a variant of Ó Loingsigh, from which Lynch. US census rank 40,000.
MacCabe Anglicized form of Irish Mac Cába (“son of Cába”), a personal name of uncertain origin. US census rank 79,345.
MacMahon Variant spelling of McMahon. US census rank 43,119.
MacMurray Variant of McMurray. US census rank 39,643.
Madole Reduced form of McDowell. US census rank 35,675.
Magennis Variant of McGinnis. US census rank 80,054.
Mallonee Variant of Maloney. US census rank 26,092.
Mattimore Irish surname from a pet form of Matthew + Irish mór (“large, great”). US census rank 63,119.
Mayhan Variant of Mahan. US census rank 35,096.
McAdory Anglicized form of Northern Irish Mac an Deoraidh (“son of the stranger”), from Old Irish déorad (“stranger, outlaw”). US census rank 26,580.
McAleenan Northern Irish variant of McLennan. US census rank 101,282.
McAloon Anglicized form of Irish Mac Giolla Eóin (“son of the servant of (Saint) John”). US census rank 31,209.
McAmis Anglicized form of Irish Mac Sheumais (“son of Séamas”). US census rank 28,435.
McAnany Variant of McEnaney. US census rank 42,786.
McAnelly Variant of McNally. US census rank 34,446.
McAninch Anglicized form of Irish Mac Aonghuis (“son of Angus”). US census rank 15,607.
McAnulty Variant of McNulty. US census rank 21,866.
McAteer Anglicized form of Northern Irish Mac an tSaoir (“son of the craftsman”), from saor (“craftsman”). US census rank 13,595.
McAulay Northern Irish variant of McCauley. US census rank 35,309.
McAuliff Variant of McAuliffe. US census rank 44,679.
McBrearty Anglicized form of Irish Mac Mhuircheartaigh (“son of Muircheartach”), a personal name meaning "navigator". US census rank 38,716.
McBreen Anglicized form of Irish Mac Braoin (“son of Braon”), a nickname from braon (“drop”). US census rank 36,053.
McBrien Anglicized form of Irish Mac Briain (“son of Brian”) or of Mac Brain (“son of Bran”), a personal name based on bran (“raven”). US census rank 27,672.
McCahill Anglicized form of Irish Mac Cathail (“son of Cathal”). US census rank 35,521.
McCance Anglicized form of Irish and Scottish Gaelic Mac Aonghuis (“son of Angus”). US census rank 33,022.
McCane Irish variant of McKean or McCahan. US census rank 20,911.
McCanless Variant of McCandless. US census rank 36,724.
McCanna Variant of McCann. US census rank 30,247.
McCarn Reduced form of McCarron. US census rank 35,603.
McCarney Anglicized form of Northern Irish Mac Cearnaigh (“son of Cearnach”), from cearnach (“victorious, triumphant”). US census rank 34,555.
McCarrell Variant of McCarroll. US census rank 32,370.
McCarren Variant of McCarron. US census rank 33,884.
McCarry Variant of McCary. US census rank 51,869.
McCarville Anglicized form of Irish Mac Cearbhaill (“son of Cearbhall”), a personal name of uncertain origin. US census rank 24,425.
McCary Variant of McGarry or an Anglicized form of Irish Mac Fhiachra (“son of Fiachra”). US census rank 12,441.
McCaughan Anglicized form of Northern Irish Mac Eacháin (“son of Eachán”), a personal name derived from a diminutive of each (“horse”). US census rank 39,490.
McCausland Anglicized form of Northern Irish and Scottish Gaelic Mac Ausaláin (“son of Absolom”), from the name of a cleric. US census rank 16,604.
McCawley From the Irish variant of McCauley. US census rank 22,709.
McChristian Northern Irish patronymic surname from the personal name Christian. US census rank 32,142.
McClaflin Variant of McLaughlin. US census rank 47,035.
McClaskey Variant of McCloskey. US census rank 20,203.
McCleery Variant of McCleary. US census rank 16,412.
McClenahan Variant of McClanahan. US census rank 23,366.
McClenny Perhaps a variant of McElhinney. US census rank 27,452.
McClenton Variant of McClinton. US census rank 30,950.
McClory Anglicized form of Scottish Gaelic and Irish Mac Labhradha (“son of Labhraidh”), a personal name which derives from the verb labhair (“to speak”). US census rank 36,940.
McClune Variant of McGlone. US census rank 37,959.
McClurkin Anglicized form of Irish Mac Cléireacháin (“son of the little priest”), from cléireach (“priest, cleric”) + án (“diminutive suffix”). US census rank 26,042.
McCluskie Variant of McCloskey. US census rank 145,757.
McCole Variant of McCool. US census rank 36,570.
McColley Probably a variant of McCullough. US census rank 20,789.
McCollom Variant of McCollum. US census rank 20,004.
McConaghy Anglicized form of Irish Mac Dhonnchaidh. US census rank 30,557.
McConahy Variant of McConaghy. US census rank 45,922.
McConathy Variant of McConaghy. US census rank 37,718.
McConaughey Variant of McConaghy. US census rank 52,802.
McCone Anglicized form of Irish Mac Comhdhain (“son of Comhdhan”), a personal name of uncertain origin. US census rank 45,537.
McConnaughey Variant of McConaghy. US census rank 26,600.
McCorry Anglicized form of Irish Mac Gothraidh (“son of Gothradh”), a Gaelicized form of the personal name Godfrey. US census rank 31,504.
McCoskey Perhaps a variant of McCaskey or an Anglicized form of Irish Mac Coscraich (“son of Coscrach”). US census rank 36,294.
McCraney Anglicized form of Irish Mac Bhranaigh (“son of Branach”), a personal name derived from a diminutive of bran (“raven”). US census rank 15,443.
McCranie Variant spelling of McCraney. US census rank 19,637.
McCroy Variant of McRoy. US census rank 48,549.
McCrystal Anglicized form of Northern Irish Mac Criostal, a variant of Criostar, Gaelicized form of Christopher. US census rank 47,112.
McCuin Variant of McQuinn. US census rank 28,704.
McCullagh Variant of McCullough. US census rank 35,059.
McCulloh Variant of McCullough. US census rank 40,697.
McCurley Origin disputed; possibly an Anglicized form of Irish Mac Toirdealbhaigh (“son of Toirdealbhach”). US census rank 12,070.
McCurtain Anglicized form of Irish Mac Curtáin, variant of Mac Cruitín. US census rank 60,581.
McDaid Variant of McDade. US census rank 32,272.
McDermitt Variant of McDermott. US census rank 30,950.
McDiarmid Anglicized form of Irish Mac Diarmaid (“son of Diarmaid”). US census rank 38,279.
McDivitt Variant of McDevitt. US census rank 25,996.
McDole Variant of McDowell. US census rank 17,027.
McDonel Variant of McDonnell. US census rank 75,813.
McDonell Variant of McDonnell. US census rank 17,094.
McDorman Perhaps an Anglicized form of Irish Mac Dornáin (“son of Dornán”), a personal name derived from a diminutive form of dorn (“fist”). US census rank 27,006.
McElderry Anglicized form of Irish Mac Giolla Dhorca (“son of the dark-haired lad”). US census rank 33,969.
McEldowney Anglicized form of Northern Irish Mac Giolla Dhomhnaigh (“son of the lad of the Sunday”), from giolla (“lad, boy”) and Domhnach (“Sunday”). US census rank 26,703.
McElhannon Anglicized form of Irish Mac Giolla Chonáin (“son of the servant of Saint Conan”). US census rank 33,503.
McElheny Variant of McElhinney. US census rank 33,375.
McElhiney Variant of McElhinney. US census rank 32,481.
McElhinney Anglicized form of Irish Mac Giolla Choinnigh (“son of the servant of (saint) Coinneach”). US census rank 25,619.
McElhinny Variant of McElhinney. US census rank 41,948.
McElligott Anglicized form of Irish Mac Uileagóid (“son of Uileagód”), a diminutive of the Gaelicized form of the personal name William. US census rank 16,859.
McElrath Anglicized form of Irish Mac Giolla Riabhaigh (“son of the brindled lad”). US census rank 10,121.
McElyea Perhaps a variant of McElwee. US census rank 15,056.
McEnaney Anglicized form of Irish Mac an Deaghánaigh (“son of the deacon”), from deagánach (“deacon”). US census rank 30,365.
McEnany Variant of McEnaney. US census rank 63,879.
McEnery Anglicized form of Irish Mac Innéirghe (“son of Innéirghe”), a personal name apparently derived from éirghe (“rising, rise”). US census rank 35,833.
McEnroe Anglicized form of Irish Mac Conchradha (“son of Conchradh”), a personal name composed of the elements cú (“hound”) + crádh (“torment”). US census rank 26,329.
McEnulty Variant of McNulty. US census rank 153,590.
McEvilly Anglicized form of Irish Mac an Mhílidh (“son of the knight”), from míleadh (“knight”). US census rank 44,220.
McFeely Anglicized form of Irish Mac Fithcheallaigh (“son of the chess player”), from fithcheallach (“chess player”). US census rank 31,269.
McFerran Variant of McFerrin. US census rank 38,010.
McFerrin Anglicized form of Irish Mac Fearáin (“son of Fearán”), a personal name derived from a diminutive form of fear (“man”). US census rank 19,062.
McGahee Variant of McGaughey. US census rank 17,699.
McGahey Variant of McGaughey. US census rank 21,109.
McGannon Anglicized form of Irish Mag Fhionnáin (“son of Fhionnán”), a personal name from a diminutive of fionn (“white, fair”). US census rank 38,180.
McGarity Anglicized form of Irish Mac Oireachtaigh (“son of Oireachtach”), a personal name which ultimately derives from oireacht (“assembly”). US census rank 14,490.
McGarrigle Anglicized form of Irish Mac Fhearghail (“son of Fearghal”), a personal name composed of the elements fear (“man”) and gal (“courage”). US census rank 44,477.
McGarrity Variant of McGarity. US census rank 23,473.
McGaugh Variant of McGough. US census rank 22,950.
McGaughey Anglicized form of Irish Mac Eachaidh (“son of Eochaidh”). US census rank 10,371.
McGaughy Variant of McGaughey. US census rank 20,050.
McGauley From the Irish variant of McCauley. US census rank 32,654.
McGeady Anglicized form of Irish Mac Céadaigh (“son of Céadach”), a byname from céadach (“hundredfold; great, immense”). US census rank 76,032.
McGeary Irish variant of McGarry. US census rank 20,933.
McGeehan Anglicized form of Irish Mac Gaoithín (“son of Gaoithín”), a personal name derived from a diminutive form of gaoth (“wise, intelligent, clever”). US census rank 17,478.
McGettigan Anglicized form of Irish Mac Eiteagáin (“son of Eiteagán”), a diminutive of eiteach (“winged”). US census rank 24,705.
McGhie Variant of McGee. US census rank 26,112.
McGillicuddy Anglicized form of Irish Mac Giolla Chuda (“son of the servant of (Saint) Chuda”), a personal name of unexplained origin. US census rank 24,678.
McGinnity Variant of McGinty. US census rank 44,477.
McGivern Anglicized form of Northern Irish Mac Uidhrín (“son of Uidhrín”), a personal name which is from a diminutive of odhar (“dun”). US census rank 20,708.
McGlade Anglicized form of Northern Irish Mag Léid, which may be a variant of McLeod. US census rank 32,405.
McGlaughlin Variant of McLaughlin. US census rank 23,682.
McGlinchey Anglicized form of Irish Mac Loingsigh (“son of Loingseach”), a given name meaning "mariner" or "sea-rover". US census rank 28,958.
McGlory Variant of McClory. US census rank 38,417.
McGlown Variant spelling of McGlone. US census rank 40,000.
McGoff Variant of McGough. US census rank 42,600.
McGoldrick Anglicized form of Irish Mac Ualghairg (“son of Ualgharg”), a personal name composed of the elements úall (“vanity, pride”) + garg (“fierce”). US census rank 10,762.
McGourty Probably an Anglicized form of Irish Mac Dhorchaidh (“son of Dorchadh”), a personal name related to dorcha (“dark”). US census rank 40,393.
McGrail Anglicized form of Irish Mac Réill, a variant of Mac Néill, from which McNeil. US census rank 13,452.
McGranaghan Variant of McGranahan. US census rank 78,873.
McGranahan Anglicized form of Irish Mac Reannacháin (“son of Reannachán”). US census rank 27,730.
McGrane Anglicized form of Irish Mac Ráighne (“son of Ráighne”), a Gaelicized pet form of the personal name Reynold. US census rank 15,500.
McGreal Variant of McGrail. US census rank 30,813.
McGreevy Irish surname, from mac Giolla Rua (“son of the red-haired youth”). US census rank 13,139.
McGrogan Anglicized form of Irish Mac Grúgáin (“son of Grúgán”). US census rank 40,697.
McGuckin Anglicized form of Irish Mac Eocháin (“son of Eochán”), a diminutive of the personal name Eochaid. US census rank 18,805.
McGuiness Anglicized from Irish mac Aonghusa. US census rank 29,392.
McGuinn Variant of McQuinn. US census rank 25,893.
McGuirt From the Irish variant of McCord. US census rank 35,096.
McHan A variant of McCann. US census rank 34,555.
McHone Either a variant of McCune or McCone. US census rank 15,997.
McIlrath Variant of McElrath. US census rank 31,754.
McIlroy Variant of McElroy. US census rank 22,690.
McIntee Variant of McAtee. US census rank 33,851.
McJunkin Anglicized form of Irish Mac Seancín. US census rank 18,890.
McJunkins Variant of McJunkin. US census rank 37,808.
McKaughan Variant of McCaughan. US census rank 69,002.
McKeehan Anglicized form of Irish Mac Caocháin (“son of Caochán”). US census rank 12,661.
McKeithen Variant of McKeehan. US census rank 26,730.
McKelvie A variant of McKelvey. US census rank 37,449.
McKelvy A variant of McKelvey. US census rank 19,783.
McKendree Variant of McHenry. US census rank 27,730.
McKendry Variant of McHenry. US census rank 25,066.
McKeough Variant of McGough. US census rank 44,823.
McKevitt Variant of McDevitt, with lenited personal name. US census rank 35,059.
McKiernan Anglicized form of Irish Mac Thighearnáin (“son of Thighearnán”), a diminutive of tighearna (“lord, master”). US census rank 13,170.
McKone Variant of McCune. US census rank 35,485.
McLaughlan A variant of McLaughlin. US census rank 55,400.
McLawhorn Americanized form of Northern Irish Mac Labhrainn (“son of Labhrann”). US census rank 22,971.
McLeroy Variant of McElroy. US census rank 18,149.
McLinden Variant of McClinton. US census rank 46,793.
McMackin Anglicized form of Northern Irish and Scottish Gaelic Mac Maicín (“son of the young man”), from a diminutive of mac (“son”). US census rank 22,619.
McMains Variant of McManus. US census rank 26,600.
McMakin Variant of McMackin. US census rank 32,238.
McManaman Variant of McMenamin. US census rank 36,847.
McManamon Variant of McMenamin. US census rank 39,592.
McManaway Variant of McMenamin. US census rank 29,416.
McManis Variant of McManus. US census rank 21,086.
McMannis Variant of McManus. US census rank 42,381.
McMeans Variant of McMahon, with the addition of the patronymic suffix -s. US census rank 16,795.
McMenamin Anglicized form of Irish Mac Meanman (“son of Meanma”), a personal name derived from meanma (“mind, spirit, courage”). US census rank 15,897.
McMenamy Variant of McMenamin. US census rank 35,485.
McMorrow Anglicized form of Irish Mac Murchadha (“son of Murchadh”), a personal name formed by the elements muir (“sea”) + cath (“battle”). US census rank 15,607.
McMurdo Variant of McMurphy. US census rank 62,640.
McMurphy Anglicized spelling of Irish Mac Murchadha (“son of Murchadh”), a personal name composed of the elements muir (“sea”) + cath (“battle”). US census rank 26,812.
McNairy Variant of McNeary. US census rank 38,380.
McNall Probably a shortened form of McNally. US census rank 30,091.
McNary Anglicized form of Irish Mac Náraigh (“son of Nárach”), a byname from nárach (“modest”). US census rank 12,249.
McNeary Variant of McNary. US census rank 44,069.
McNease Variant spelling of McNeese. US census rank 45,537.
McNeece Variant of McNeese. US census rank 34,781.
McNeeley Variant of McNeely. US census rank 19,328.
McNeese Anglicization of Irish Mac Naoise, a patronymic from a shortened form of Aonghas (“Angus”). US census rank 10,117.
McNeice Variant spelling of McNeese. US census rank 44,544.
McNelis Anglicized form of Irish Mac Niallghuis (“son of Niallghus”), a personal name composed of Níall (“a personal name”) + gus (“choice or vigor”). US census rank 19,847.
McNellis Variant of McNelis. US census rank 27,800.
McNemar Variant of McNamara. US census rank 27,800.
McNicholas From the Irish patronymic from the personal name Nicholas. US census rank 15,061.
McNinch Variant of McAninch. US census rank 24,804.
McNish Variant of McNeese. US census rank 23,203.
McParland Variant of McPartland. US census rank 34,261.
McPartland Northern Irish variant of McFarlane, without lenition. US census rank 18,527.
McPeake Variant spelling of McPeak. US census rank 45,303.
McQuaid Anglicized form of Irish Mac Uaid (“son of Uad”). US census rank 12,093.
McQuaide Variant of McQuaid. US census rank 39,043.
McQuaig Anglicized form of Irish Mac Cuaig, a surname of uncertain origin. US census rank 30,035.
McQuain Anglicized form of Irish Mac Cuáin (“son of Cuán”), a diminutive of cú (“hound”). US census rank 33,611.
McQueeney Lenited variant of McSweeney. US census rank 29,114.
McQuinn Anglicized form of Irish Mac Cuinn (“son of Conn”). US census rank 18,916.
McRaney Variant of McCraney. US census rank 47,612.
McRoy Anglicized form of Irish Mac Rúaidh (“son of Rúadh”), a byname from ruadh (“red”). US census rank 17,138.
McShea Anglicized form of Irish Mac Séaghdha (“son of Séaghdha”), a byname meaning "fine" or "fortunate". US census rank 29,014.
McSherry Anglicized form of Irish Mac Searraigh (“son of Searrach”), a personal name based on searrach (“colt, foal”). US census rank 15,162.
McTague Variant of McTigue. US census rank 27,268.
McTeer Reduced form of McAteer. US census rank 41,517.
McTiernan Variant of McKiernan. US census rank 43,339.
McTighe Variant of McTigue. US census rank 32,370.
McTigue Anglicized form of Irish Mac Taidhg (“son of the poet”), from tadg (“poet”). US census rank 21,415.
McWhirt Variant of McCord. US census rank 41,459.
McWhite Partly translated Anglicized form of Irish Mac Faoitigh, a patronymic from a Gaelic form of English White. US census rank 26,524.
Mealey Variant of Malley. US census rank 16,752.
Mealy Variant of Malley. US census rank 21,381.
Meaney Variant of Mooney. US census rank 15,001.
Meany Variant of Mooney. US census rank 26,112.
Meara Shortened form of O'Meara. US census rank 41,249.
Meenan Reduced Anglicized form of Irish Ó Mianáin (“descendant of Mianán”), a diminutive form of mian (“desire, wish”). US census rank 29,248.
Megee Variant of McGee. US census rank 22,360.
Mehaffey Variant of Mahaffey. US census rank 17,303.
Meneely Variant of McNeely. US census rank 32,585.
Merrigan Anglicized form of Irish Ó Muireagáin. US census rank 22,267.
Mescal Reduced Anglicized form of Irish Ó Meiscill (“descendant of Meisceall”). US census rank 122,574.
Millikan Variant of Milligan. US census rank 16,454.
Millin Reduced Anglicized form of Irish Ó Maoilfhinn (“descendant of Maoilfhinn”), a personal name composed by the elements maol (“chief”) + fionn (“fair, white”). US census rank 34,185.
Minahan Variant of Moynihan. US census rank 31,754.
Minihane Variant of Moynihan. US census rank 133,930.
Minish Variant of McNeese. US census rank 38,010.
Minogue Reduced Anglicized form of Irish Ó Muineog (“descendant of Muineog”), a variant of Manóg, a personal name derived from a diminutive form of manach (“monk”). US census rank 21,662.
Minteer Variant of McAteer. US census rank 39,643.
Mogan Either a variant of Mohan, or from Irish Ó Mógáin (“descendant of Mógán”). US census rank 24,492.
Molony Variant of Maloney. US census rank 39,536.
Monds From the Irish surname of unclear origin. US census rank 31,303.
Mooneyhan Variant of Moynihan. US census rank 24,949.
Moroney Reduced Anglicized form of Irish Ó Maolruanaidh (“descendant of the devotee of (Saint) Ruanadh”). US census rank 13,457.
Morphis Variant of Murphy. US census rank 20,854.
Moynahan Variant of Moynihan. US census rank 37,907.
Muldowney Variant of Maloney. US census rank 22,630.
Mulhall Reduced Anglicized form of Irish Ó Maolchathail (“descendant of the devotee of (Saint) Cathal”). US census rank 16,180.
Mulhern Anglicized form of Irish Ó Maoil Chiaráin. US census rank 10,384.
Mulkern Variant of Mulhern. US census rank 38,781.
Mullahy Reduced Anglicized form of Irish Ó Maolaithche (“descendant of the servant of Aithche”), a personal name of unclear origin. US census rank 78,873.
Mullally Anglicized form of Irish Ó Maolalaidh (“descendant of Maolaladh”), a personal name composed by the elements maol (“chieftain”) + aladh (“speckled, piebald”). US census rank 22,019.
Mullaly Variant of Mullally. US census rank 29,704.
Mullarkey Reduced Anglicized form of Irish Ó Maoilearca (“descendant of the devotee of (Saint) Earc”), perhaps a byname from earc (“newt”). US census rank 22,865.
Mullican Variant of Mulligan. US census rank 16,549.
Mulloy Variant of Molloy. US census rank 17,027.
Mulqueen Anglicized form of Irish Ó Maolchaoine (“descendant of Maolchaoine”), a personal name meaning "devotee of (Saint) Caoine". US census rank 32,440.
Mulroney Variant of Moroney. US census rank 58,437.
Mulroy Anglicized form of Irish Ó Maolruaidh (“descendant of Maolruadh”), a personal name composed of the elements maol (“chief”) + ruadh (“red”). US census rank 19,694.
Mulvany Variant of Mulvaney. US census rank 40,270.
Mulvenna Variant of Mulvaney. US census rank 73,555.
Murley Reduced Anglicized form of Irish Ó Murthuile (“descendant of Murthuile”), a personal name derived from murthuile (“sea tide”). US census rank 18,093.
Murnane From the Irish surname, from Ó Murnáin, reduced from Manannáin (“descendant of Manannán”), a name related to the root of Isle of Man. US census rank 18,393.
Murrin Anglicized form of Irish Ó Muireáin (“descendant of Muireán”), a diminutive of a personal name beginning with muir (“sea”). US census rank 23,737.
Murtagh From the Irish surname, from Ó Muircheartaigh (“descendant of Muircheartach”), a personal name meaning "navigator," from muir (“sea”) + ceard (“skilled”). US census rank 15,879.
Nealon Reduced Anglicized form of Irish Ó Nialláin (“descendant of Niallán”), a diminutive of the personal name Niall. US census rank 14,872.
Neals Variant of Neal, with excrescent -s. US census rank 45,060.
Neeld A variant of Neill, with an excrescent -d. US census rank 36,520.
Neenan Reduced Anglicized form of Irish Ó Naoidheannáin (“descendant of Naoidheannán”), a nickname from naoidhean (“infant, baby”). US census rank 35,603.
Neilan Variant of Nealon. US census rank 35,833.
Neild A variant of Neill, with an excrescent -d. US census rank 55,282.
Nelligan Reduced Anglicized form of Irish Ó Niallagáin (“descendant of Niallagán”), a double diminutive of Niall. US census rank 22,709.
Neylon Variant of Nealon. US census rank 34,023.
Nulty Reduced form of McNulty. US census rank 42,381.
Nunan A variant of Noonan. US census rank 39,379.
O'Bar Variant spelling of O'Barr. US census rank 43,067.
O'Barr Anglicized form of Irish Ó Bairr, a variant of Ó Báire, from which O'Barry. US census rank 33,067.
O'Beirne Anglicized form of Irish Ó Broin (“descendant of Bran”), a byname from bran (“raven”). US census rank 38,482.
O'Berry Anglicized form of Irish Ó Béara (“descendant of Béara”), a personal name of unexplained origin. US census rank 15,969.
O'Callaghan Variant of Callahan. US census rank 10,003.
O'Conner Variant of O'Connor. US census rank 10,050.
O'Dea Anglicization of Irish Ó Deághaidh (“descendant of Deághadh”), a personal name held by tenth-century Irish chieftain, from deagh (“good”) + ádh (“luck, fate”). US census rank 10,618.
O'Doherty Anglicized form of Irish Ó Dochartaigh (“descendant of Dochartach”). US census rank 28,895.
O'Donald Variant of O'Donnell, altered by influence of Donald. US census rank 43,215.
O'Donnel Variant of O'Donnell. US census rank 50,251.
O'Donoghue Anglicized form of Irish Ó Donnchadha (“descendant of Donnchadh (“Duncan”)”). US census rank 13,648.
O'Donovan From Irish Ó Dunnabháin. US census rank 18,513.
O'Dwyer See Dwyer. US census rank 17,792.
O'Fallon See Fallon. US census rank 43,008.
O'Flaherty Anglicization of Irish Ó Flaithbheartaigh. US census rank 19,869.
O'Flynn Borrowed from Irish Ó Floinn. US census rank 36,342.
O'Gara Anglicized form of Irish Ó Gadhra (“descendant of Gadhra”), a personal name derived from gadhar (“hound, mastiff”). US census rank 16,031.
O'Gorman Anglicized form of Irish Ó Gormáin (“descendant of Gormán”), a diminutive form of gorm (“dark blue; noble”). US census rank 12,517.
O'Guin Variant of O'Quinn. US census rank 36,396.
O'Guinn Variant of O'Quinn. US census rank 39,285.
O'Harra A variant of O'Hara. US census rank 44,751.
O'Keeffe Variant of O'Keefe. US census rank 12,365.
O'Lear Variant of O'Leary. US census rank 43,557.
O'Mary Probably a variant of O'Mara, influenced by the cult of the Virgin Mary. US census rank 34,306.
O'Quin Variant of O'Quinn. US census rank 29,616.
O'Riley From Irish Ó Raghallaigh, commonly anglicized as O'Reilly. US census rank 25,020.
O'Riordan Borrowed from Irish Ó Ríoghbhárdáin. US census rank 36,294.
Pendergraft Variant of Prendergast. US census rank 12,062.
Pendergraph Variant of Prendergast. US census rank 42,735.
Philbin Reduced Anglicized form of Irish Mac Philbín, a patronymic from a Gaelic pet form of the personal name Philip. US census rank 16,717.
Powderly Irish habitational surname from a place in Meath. US census rank 50,632.
Prunty Reduced Anglicized form of Irish Ó Proinntigh (“descendant of Proinnteach”). US census rank 11,513.
Quealy Reduced Anglicized form of Irish Ó Caollaidhe (“son of Caollaidhe”), an ancient Irish personal name. US census rank 55,632.
Queenan Reduced Anglicized form of Irish Ó Cuineáin (“descendant of Cuineán”), a personal name derived from a diminutive form of cú (“hound”). US census rank 34,101.
Quigg Reduced Anglicized form of Irish Ó Cuaig. US census rank 19,551.
Quilty Variant of Kielty. US census rank 35,148.
Raffety Variant of Rafferty. US census rank 41,826.
Raftery Reduced Anglicized form of Irish Ó Reachtabhra (“son of Reachtabhra”), a personal name which derives from reacht (“decree”). US census rank 16,431.
Ratigan Reduced Anglicized form of Irish Ó Reachtagáin (“descendant of Reachtagán”), a personal name from a diminutive of reachtaire (“administrator, steward”) or reacht (“law”). US census rank 34,217.
Rattigan Variant of Ratigan. US census rank 30,530.
Rawl Reduced Anglicized form of Irish Ó Raghaill, a variant of Ó Raghailligh, from which O'Reilly. US census rank 43,886.
Reaney Variant of Rainey. US census rank 48,879.
Rork Reduced and altered form of O'Rourke. US census rank 40,169.
Roughan Reduced Anglicized form of Irish Ó Ruadhacháin (“descendant of Ruadhachán”), a double diminutive of ruadh (“red”). US census rank 106,101.
Rourk Variant of Rourke, a reduced form of O'Rourke. US census rank 34,739.
Ruane Anglicized from Irish Ó Ruadháin (“descendant of Ruadhán”). US census rank 13,208.
Santry Anglicized form of Irish Seantrabh, from sean (“old”) + treibh (“tribe”). US census rank 44,679.
Scallan Reduced Anglicized form of Irish Ó Scealláin (“descendant of Sceallán”), a byname from sceallán (“pip, kernel, stone of fruit”). US census rank 31,440.
Scallon Variant of Scallan. US census rank 38,825.
Scally Reduced Anglicized form of Irish Mac Scalaidhe, a patronymic surname from scolaidhe (“scholar”). US census rank 19,411.
Scantlin Variant of Scanlon. US census rank 42,328.
Scollon Variant of Scullion. US census rank 73,107.
Scullion Probably a reduced Anglicized form of Irish Ó Scoláidhín, a diminutive form of scolaidhe (“student”). US census rank 27,672.
Seery Reduced Anglicized form of Irish Ó Saoraidhe (“descendant of Saoraidhe”), a personal name based on saoraidhe (“freeman”). US census rank 20,413.
Shawhan Variant of Sheehan. US census rank 38,660.
Sheeran From O'Sheeran, an Anglicization of the Irish Ó Sírín or Irish Ó Síoráin. US census rank 18,331.
Shevlin Reduced Anglicized form of Irish Ó Seibhleáin (“descendant of Seibhleán”). US census rank 18,149.
Shinnick Reduced Anglicized form of Irish Ó Sionnaigh (“descendant of Sionnach”), a personal name based on sionnach (“fox”). US census rank 37,449.
Shovlin Variant of Shevlin. US census rank 36,002.
Shugrue Variant of Sugrue. US census rank 42,533.
Skehan Reduced Anglicized form of Irish Ó Sceacháin (“descendant of Sceachán”), a personal name derived from a diminutive of sceach (“briar, thornbush”). US census rank 39,103.
Slevin Variant of Slavin. US census rank 22,865.
Slowey Reduced Anglicized form of Irish Ó Sluaghadhaigh (“descendant of Sluaghadach”), a personal name derived from a diminutive of sluaghadh (“hosting, fit for hosting”). US census rank 39,424.
Solivan Variant of Sullivan. US census rank 25,516.
Stranahan Reduced Anglicized form of Irish Ó Sranacháin (“descendant of Sranachán”), a personal name derived from a diminutive of srannach (“snoring, stertorous”). US census rank 40,323.
Sugrue Reduced Anglicized form of Irish Ó Siochfhrádha (“descendant of Siochfhrádh”), a Gaelicized form of the Old Norse personal name Sigfriðr (“Siegfrid”). US census rank 22,332.
Sullivant Variant of Sullivan. US census rank 36,724.
Sweany Variant of Sweeney. US census rank 37,075.
Tarpey Reduced Anglicized form of Irish Ó Tarpaigh (“descendant of Tarpach”), a byname from torpach (“pot-bellied”). US census rank 26,423.
Toohey From Irish Ó Tuathaigh (“descendant of the chief”). US census rank 12,062.
Toolan Variant of Toland. US census rank 40,983.
Tormey Reduced Anglicized form of Irish Ó Tormaigh (“descendant of Tormach”), a Gaelicized form of the Old Norse personal name Þórmóðr. US census rank 21,381.
Torpey Variant of Tarpey. US census rank 20,789.
Touhey Variant of Toohey. US census rank 37,075.
Towey Reduced Anglicized form of Irish Ó Toghdha (“descendant of Toghdha”), a byname from toghadh (“choice, selection”). US census rank 27,837.
Treacy Reduced Anglicized form of Irish Ó Treasaigh (“descendant of Treasach”), a personal name ultimately derived from treise (“strength, power”). US census rank 16,694.
Tunney Reduced Anglicized form of Irish Ó Tonnaigh (“descendant of Tonnach”), a personal name derived from tonn (“wave, billow”). US census rank 20,413.
Tuohey Variant of Toohey. US census rank 41,459.
Tuohy Variant of Toohey. US census rank 16,162.
Vahey Reduced Anglicized form of Irish Mac an Bheathadh (“son of life”), from beatha (“life”). US census rank 41,034.
Vallely Probably a much Anglicized form of Irish Mac Giolla Mhuire (“son of the servant of Mary”), which is also the source of the surname Gilmore. US census rank 33,884.
Wheelan Variant of Whelan. US census rank 64,670.
Wheeland Variant of Whelan. US census rank 36,198.

How this list was compiled: A list by a written rule, built on 2 October 2026. A surname is listed when English Wiktionary files it under 'English surnames from Irish' (https://en.wiktionary.org/wiki/Category:English_surnames_from_Irish, 1,707 entries listed that day), its entry gives an origin that could be read plainly (the opening of its etymology, or the line of its surname sense), and the spelling is in the US Census Bureau's file of last names reported 100 or more times in the 2020 Census (https://www2.census.gov/topics/genealogy/2020surnames/Names2020_LastNames_RaceHispanic.xlsx, linked from https://www.census.gov/topics/population/genealogy/data/2020_names.html). A name of the US top 1,000 is listed even where its entry gives no origin, with its rank alone (Manning, Hines, Farrell). A name is left out when its entry gives only another origin, such as a Scottish Gaelic or an English one, for the surname (Cameron, Logan, Taylor, Lewis); where an entry gives an English origin first and an Irish form second (Blake, Brady), the card gives the Irish form and nothing else. A name below rank 8,786 in the US census that another list of this site already holds is left out, unless a card here names it as the name it is a variant of. A card that says only that a name is a variant or a reduced form of another is kept only when that other name is on the list. The card's sentence is the opening of the entry's etymology, sometimes shortened, with the Irish-language form and the meaning the entry gives; where an entry says only that the name is a variant of another, the card says that. An origin is what a dictionary records for the surname in general, not for any one family. The rank is the name's place among all last names in the 2020 Census of the United States, where the census writes O'Brien as OBRIEN; it counts everyone with the spelling, it is not a rank in Ireland, and no count of surnames in Ireland is used here. The type (an Ó name, a Mac name, another name) is read from the Irish form, or from the spelling (O', Mc, Mac, Mag), or from the words 'descendant of' and 'son of' in the entry's sentence. Licence: Origins and Irish forms: English Wiktionary, CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). The census file is a work of the US federal government and in the public domain (17 U.S.C. 105). The selection is our own work.