Irish Surnames

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  • Most Irish surnames, in their Gaelic form, start with Ó, Mac, or occasionally de (which indicates a name of Norman origin). Ó means 'grandson of', Mac means 'son of' and de means 'of'.

    English Form Irish Form
    Adair Ó Daire
    Bannon Ó Banáin
    Bardon Ó Bardáin
    Beary Ó Beara
    Begley Ó Beaglaioch
    Beglan Ó Beigleighinn
    Bergin Ó hAimeirgin
    Berrigan Ó hAimeirgin
    Blake de Blaca
    Braden Ó Bradáin
    Bradigan Ó Bradagáin
    Brady Mac Bradaigh
    Bragan Ó Bragain
    Branigan Ó Branagain
    Brennigan Ó Branagain
    Brannagh Ó Breathnach
    Brannan Ó/Mac Branain
    Bree Ó Breaghdha
    Bray Ó Breaghdha
    Breen Ó/Mac Braoin
    Brennan Ó Braonain
    Breslin Ó Breaslain
    Brogan Ó Brogain
    English Form Irish Form
    Cabe Mac Caba
    Cadden Mac Cadain
    Cagney Ó Caingne
    Cahey Mac Eachaidh
    Callinan Ó Callanain
    Canavan Ó Ceanndubháin
    Carey Ó Ciardha
    Carley Mac Fhearghaile
    Carlin Ó Cairealláin
    Casey Ó/Mac Ceasaigh
    Cassidy Ó Caiside
    Cavanagh Cavanagh
    Clancy Mac Fhlannchaidh
    Cody Mac Oda
    Collins Ó Coilean
    Coulter Ó Coltair
    Conlan Ó Connelain
    Connery Ó Conaire
    Corcoran Mac Corcrain
    Corey Mac Godhfraigh
    Corley Ó Thoirdealbhaigh
    Cullen Ó/Mac Cuilinn
    Curran Ó Corráin

    English Form Irish Form
    Delaney Ó Dubhshlaine
    Devlin Ó Doibhilin
    Dillon de Leon
    Donegan Ó Donnagáin
    Donovan Ó Donnabháin
    Doran Ó Deorain
    Doyle Ó Dubhghaill
    Duane Ó Dubhan
    Duff Dubh
    Duffy Ó Dubhthaigh
    Dugan Ó Dubhgain
    Dwyer Ó Duibhir
    Egan Mac Aodhagáin
    Fagan Ó Faodhagáin
    Fallon Ó Fallamhán
    Farrell Ó Fearghal
    Farren Ó Faracháin
    Finnegan Ó Fionnagain
    Fitzgerald Mac Geralt
    Fitzpatrick Mac Pádraig
    Flannery Ó Flannabhra
    English Form Irish Form
    Flynn Ó Floinn
    Gillan Ó Giollain
    Gowan Ó Gabhann
    Grady Ó Grádaigh
    Hagan Ó hAgain
    Hanlon Ó hAnluan
    Hayes Ó hAodha
    Hennessey Ó hAonasa
    Hogan Ó hOgain
    Kavanagh Caomhanach
    Kearney Ó Cearnaigh
    Keegan Mac Aodhagain
    Keenan Ó Cianáin
    Kelly Mac Ceallach
    Kenna Mac Cionaith
    Kennan Mac Fhionnan
    Kennedy Ó Cinnéde
    Kerrin Ó Ceirin
    Kiley Ó Cadhla
    Kinsella Cinnsealach
    Kirby Ó Ciarmhaic

    English Form Irish Form
    Lacy deLeis
    Larkin Ó Lorcáin
    Lowery Ó Labhradha
    Leary Ó Laoghaire
    Lennon/Lennan Ó Leannain
    Madigan Ó Madagáin
    Maguire Mac Uidhir
    Malone Mal Eoin
    Malinn Maoilfhinn
    Manley Ó Manlaigh
    Meara, Mara Ó Meadhra
    Meegan Ó Miadhagáin
    Murphy Ó Murchu
    Murray Ó Muireadhach
    Nolan Ó Nualláin
    English Form Irish Form
    Pierce/Pearse Ó/Mac Piarais
    Quillan Ó Cuileann
    Quinn Ó Cuinn
    Quinlan Ó Caoinlean
    Regan/Reagan Ó Riagáin
    Reilly Ó Raghallaigh
    Ryan Ó Riain
    Scully Ó Scolaighe
    Shannon Seanáin
    Sheridan Ó Siridean
    Sorley Mac Sorlaigh
    Sullivan Ó Suileabháin
    Tracy Ó Treasaigh
    Vaughan Ó Beacháin
    . .
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