| Name |
Meaning |
Irish Spelling |
Gender |
| Aidan | dim. of Aodh | Aodhán, áedán | M |
| Angus | oinos "one" gustus "choice" | Aonghus | M |
| Anlon | great warrior | Anluan | M |
| Auliffe | Ólaf | Amhlaoibh | M |
| Barclay | borrowing of Bartholomew | Parthalán | M |
| Bartley | borrowing of Bartholomew | Parthalán | M |
| Behellagh | | Baothghalach | M |
| Berkley | borrowing of Bartholomew | Parthalán | M |
| Baskin | | Baisceann | M |
| Barden | "poet" | Bardán | M |
| Beckan | dim. of beag, "small" | Beacán | M |
| Beck | "little, small" | Becc, Beag | M |
| Bergin | "soldier" | Beirgín | M |
| Bannon | from Latin Benignus, "benign" | Beanón | M |
| Bowie | "living fire" | Beoaodh | M |
| Bolan, Boland | | Beollán | M |
| Brannigan | dim. of Bran | Branagán | M |
| Brennan | dim. of Bran | Branán | M |
| Brannan | dim. of Bran | Branán | M |
| Breck | "speckled" | Breac | M |
| Brandon | from Latinised version of Brénainn (Brandanus, Brendanus) | Breandán | M |
| Brendan | from Latinised version of Brénainn (Brandanus, Brendanus) | Breandán | M |
| Breslin | dim of Bressal | Breaslán | M |
| Breslan | dim of Bressal | Breaslán | M |
| Brian | "high, noble" | Brian, Brión | M |
| Brassal | "brave or strong in conflict" | Breasal | M |
| Brock | "badger" or "sharpness" | Brocc | M |
| Brogan | | Brócán | M |
| Breen | | Bróen, Braon | M |
| Bohan | dim. of Búadach | Búachán | M |
| Bohannon | dim. of Búadach | Búachán | M |
| Bowen | "lasting, enduring" | Buan | M |
| Carthage | "loving" | Carthach | M |
| Cass | curly-haired | Cas | M |
| Cassan | from Cass, curly-haired | Cassán | M |
| Cahill | strong in battle | Cathal | M |
| Cahillan | dim of Cathal, "strong in battle" | Cathalán | M |
| Caffar | "protector" | Cathbharr | M |
| Cahern | battle-lord | Cathchern | M |
| Cawthra | battle-king | Cathra | M |
| Carleton | | Caireallán | M |
| Carolan | | Caireallán | M |
| Calvagh | "bald" | Calbhach | M |
| Callough | "bald" | Calbhach | M |
| Carroll | | Coireall | M |
| Cleary | clerk, cleric | Cléireach | M |
| Clarkin | dim. of Cleary | Cléirchín | M |
| Coffey | victorious | Cofach | M |
| Colin | | Coilín | M |
| Colman | from Latin, Columba "a dove" | Colman | M |
| Cowal | | Comgall | M |
| Cowan | | Comhghán | M |
| Connell | strong as a wolf | Conall | M |
| Conan | hound, wolf | Conán | M |
| Connor | lover of wolves | Conchúr | M |
| Conly | | Conláed | M |
| Conn | wisdom | Conn | M |
| Conry | king of wolves | Conrí | M |
| Corcoran | from corcur, red, crimson, purple | Corcrán | M |
| Cormick | | Cormac | M |
| Creegan | "a horse" | Crechán | M |
| Creenan | old | Críonán | M |
| Creedon | | Críodán | M |
| Cromawn | crooked, bent | Cromán | M |
| Cronan | swarthy, yellow | Crónán | M |
| Cooley | hound of the Ulstermen | Cú Ula | M |
| Cullen | youth | Coileán | M |
| Cundles | | Cuinnleas | M |
| Connor | | Cainnear, Conor | M |
| Day | flame, fire | Daigh | M |
| Derry | flame, fire | Daighre | M |
| Devin | a deer, an ox | Daimhín | M |
| Devine (deveen) | a deer, an ox | Daimhín | M |
| Darry | fruitful | Dáire | M |
| Daly | popular | Dálach | M |
| Dallan | blind | Dallán | M |
| Davin | little stag, little ox | Damhán | M |
| Dahal | swift, nimble | Dathal | M |
| Declan | | Deaglán | M |
| Dermot | | Diarmaid | M |
| Dimman | dim. of Diarmait | Díomán | M |
| Dempsey | | Díomasach | M |
| Donnell | world-mighty | Dónal | M |
| Donall | world-mighty | Dónal | M |
| Donegan | dim. of Donn | Donnagán | M |
| Donagh | from Donn | Donncha | M |
| Dunnagh | from Donn | Donncha | M |
| Donnelly | princely | Donnghal | M |
| Donovan | dark person | Donnabháin | M |
| Durkin | melancholy | Duarcán | M |
| Duggan | little dark lad | Baisceann | M |
| Dewald | | Dualtach | M |
| Duhan | dark-haired person | Dubhán | M |
| Deegan | black-haired person | Duígeann | M |
| Dowd | | Dubhda | M |
| Dougal | dark stranger | Dubhghall | M |
| Duffy | dark, black | Dubhthach | M,F |
| Dennehy | | Duinneacha | M |
| Dineen | dim. of Donn | Duinnín | M |
| Downey | leader | Dúnadhach | M |
| Donahey | leader | Dúnadhach | M |
| Doonan | | Dúnáin | M |
| Dowling | | Dúnlang | M |
| Dunlang | | Dúnlang | M |
| Eamonn | | éamonn | M |
| Egan | dim. of áed | áeducan, Aodhagán | M |
| Eher | "sharp, keen, fierce" | Aichear | M |
| Enos | oinos "one" gustus "choice" | Aonghus | M |
| Eunan | | Adhamhnán | M |
| Falley | | Failghe | M |
| Fallon | | Faithleann | M |
| Feheen | | Feichín | M |
| Farquhar | | Fearchar | M |
| Fergal | | Fearghal | M |
| Farrell | | Fearghal | M |
| Ferris | | Fearghus | M |
| Fergus | | Fearghus | M |
| Fineen | kin-slayer | Fionghuine | M |
| Finnegan | fair | Fionnagán | M |
| Finnan | | Fionnán | M |
| Finbar | | Fionnbharr | M |
| Finn | | Fionn | M |
| Fanahan | fair hound, fair warrior | Fionnchú | M |
| Finney | | Fionnach | M,F |
| Finnian | fair | Finnian | M |
| Finnan | fair | Finnian | M |
| Feehal | | Fítheal | M |
| Flaherty | princely | Flathartach | M |
| Flanagan | bright red | Flannagánán | M |
| Fogarty | outlaw | Fógarta | M |
| Fursey | | Fursa | M |
| Gallagher | | Gallchobhar | M |
| Gay | | Gáeth | M |
| Garvin | | Garbhán | M |
| Gareth | from Old German Gairovald, ger "spear" vald "rule" | Gearóid | M |
| Garrick | from gerr "short" | Gearróc | M |
| Gary | "noble, proud" | Guaire | M |
| Geaney | "captive, prisoner" | Géibheannach | M |
| Gilchrist | "servant of Christ" | Giolla Chríost | M |
| Gillespie | "servant of the bishop" | Giolla Easpaig | M |
| Gileese | "servant of Jesus" | Giolla íosa | M |
| Gilligan | "little lad" | Gillagán | M |
| Gorman | dark, swarthy complexion | Gormán | M |
| Grellan | | Greallán | M |
| Griffin | "a fox" | Criofan | M |
| Haffy | | Affiath | M |
| Hallinan | "soft, mild person" | áilgheanán | M |
| Hallisey | eager | áilíosach | M |
| Hanlon | great warrior | Anluan | M |
| Hanly | | áinle | M |
| Hannigan | | Aonagán | M |
| Hanrahan | "a champion, a hero," | ánrothán | M |
| Hartigan | dim of Art | Artagán | M |
| Heffernan | | Ifearnán | M |
| Hegarty | "unjust person" | éigeartach | M |
| Hogan | youth, lad | ógán | M |
| Horan | dark, grey-brown | órán | M |
| Houlihan | from Uallach, "proud" | Uallachán | M |
| Ivor | | éibhar | M |
| Kale | slender | Caol | M |
| Kane | der. from cath, "a battle" | Cathán | M |
| Kealan | "slender" | Caolán | M |
| Keane | | Cian | M |
| Keely | handsome | Cadhla | M |
| Keehan | dim-sighted | Caochán | M |
| Keenan | | Cianán | M |
| Kellagh | bright-headed | Ceallach | M |
| Kelly | bright-headed | Ceallach | M |
| Kennedy | ugly-headed | Cinnéide | M |
| Kennelly | wolf-head | Cionnaola | M |
| Kenny | | Coinneach | M |
| Kenny | | Cionaodh | M |
| Kerill | | Coireall | M |
| Kevin | beautiful child | Caoimhín | M |
| Kieran | "dark, black", dim. of Ciar | Ciarán | M |
| Kilian | a church, a cell | Cillín | M |
| Kinsella | proud, masterful | Cinnsealach | M |
| Kirby | dark son | Ciarmhac | M |
| Kirk | heart; red, crimson | Corc | M |
| Kyne | wild goose | Cadhan | M |
| Lachlan | probably "Viking" | Lochlainn | M |
| Lasran | from lassar, "flame, fire" | Laisreán | M |
| Leary | "calf-herd" | Laoghaire, Laoire | M |
| Leegan | "snow-head" | Laidhgeann | M |
| Leenan | "grey lad" | Liadhnán | M |
| Lennan | "lover, sweetheart" | Leannán | M |
| Liach | "songful, poetic" | Laoidheach | M |
| Liam | dim. of Uilliam (William) | Liam | M |
| Lindsay | seafarer, exile | Loinseach | M |
| Lonan | lon "blackbird" | Lonán | M |
| Lonergan | lonn "bold, eager" + garg "rough, fierce" | Lonargán | M |
| Loran | lúar "fierce" | Lúarán | M |
| Lorcan | lorcc "silent" or "fierce" | Lorcán | M |
| Luke | "bright, radiant" | Lúach | M |
| Lugh | light, brightness | Lugh | M |
| Luhan | dim. of Lugh, "light" | Lughán | M |
| Luhern | Lugh + tigern "a lord" | Lúithiarn | M |
| Lynagh | a Leinsterman | Laighneach | M |
| Lynch | seafarer, exile | Loinseach | M |
| Lysagh | man of Laois | Laoiseach | M |
| Macartan | son of the rowan tree | Mac Cáirthinn | M |
| Maccon | son of a wolf | Mac Con | M |
| MacKillan | son of the holly | Leannán | M |
| McGrath | son of grace | Leannán | M |
| Malachy | "devotee of St Máedóc" | Maolmhaodhóg | M |
| Mallon | | Meallán | M |
| Malone | devotee of St. John | Maol Eoin | M |
| Maher | "fine, majestic" | Meachar | M |
| Mahoney | "bear-calf" | Mathúin | M |
| Mahon | "bear-calf" | Mathúin | M |
| Manny | | Maine | M |
| Manus | from Latin, magnus, "great" | Mánus | M |
| Maurice | "sea-strength" | Muiríos | M |
| Mayogue | | Maodhóc | M |
| Mayne | "silent" | Máen | M |
| Meany | from Máen, "silent" | Maonach | M |
| Melorran | "devotee of St Odrán" | Maolóráin | M |
| Merrick | | Muiríoch | M |
| Mohan | derived from muad, "noble, good" | Muadhán | M |
| Molloy | from muad, "noble or proud" | Maol Mhuadh | M |
| Mooney | from Máen, "silent" | Maonach | M |
| Morann | | Morann | M |
| Moriarty | | Muircheartach | M |
| Morrigan | perhaps dim. of muire, "a lord" | Muireagán | M |
| Morris | "sea-strength" | Muiríos | M |
| Muldoon | warrior of the fortress | Maol Dúin | M |
| Mullin | "a warrior" | Maolán | M |
| Mulroney | "from ruanaid, a champion, a strong man" | Maolruanaí | M |
| Murrough | | Murchadh | M |
| Murray | | Murchadh | M |
| Murtagh | | Muircheartach | M |
| Naughton | | Neachtan | M |
| Nessan | | Neasán | M |
| Neill | | Niall | M |
| Niall | | Niall | M |
| Nile | | Niall | M |
| Nealon | | Niallán | M |
| Neeshagh | | Naoise | M |
| Olan | | Eolann | M |
| Olcan | a wolf | Olcán | M |
| Olcar | | ólchobhar | M |
| Oren | dark, grey-brown | órán | M |
| Osheen | dim. of oss, "a deer" | Oisín | M |
| Ossnait | deer, fem. form of Ossán | Ossnait | M |
| Ossan | dim. of oss, a deer | Ossán | M |
| Oscar | deer-lover | Osgar | M |
| Owen | "born of the yew" | Eoghan | M |
| Pearce | borrowing of French Piers | Piaras | M |
| Pierce | borrowing of French Piers | Piaras | M |
| Phelan | | Faolán | M |
| Quinlan | of beautiful shape | Caíndelbán, Caoinleán | M |
| Quinlevan | of beautiful shape | Caíndelbán, Caoinleán | M |
| Quinlisk | | Cuinnleas | M |
| Quirke | heart; red, crimson | Corc | M |
| Quain | dim. of cú, "wolf" | Cuán | M |
| Randal | | Raghnall | M |
| Rannal | | Raghnall | M |
| Rohan | | Reabhachán | M |
| Rowan | | Reabhachán | M |
| Raymond | Old German ragan "counsel" mund "protection" | Réamonn | M |
| Ryan | dim. of rí, a king | Rian | M |
| Rickard | borrowing of Richard | Riocard | M |
| Regan | dim. of rí, a king | Ríoghán | M |
| Reehan | dim. of rí, a king | Ríoghán | M |
| Riordan | royal poet | Ríordán | M |
| Reardon | royal poet | Ríordán | M |
| Roarty | rushing, impetuous | Robhartach | M |
| Reilly | | Raghallach | M |
| Ronan | from rón, "a seal" | Rónán | M |
| Ross | | Ross, Russ | M |
| Russ | | Ross, Russ | M |
| Roogan | "red-haired" | Rúadhagán | M |
| Ruanait | fem. form of Rúadán | Rúadnait | M |
| Roodan | | Rúadhán | M |
| Rory | | Ruaraí | M |
| Rooney | "from ruanaid, a champion, a strong man" | Ruanaí | M |
| Scannell | "quarrel" | Scannal | M |
| Scanlon | dim. of Scannal | Scannlán | M |
| Scully | "scholar" | Scolaí | M |
| Shamus | | Séamas | M |
| Sheehan | "a hawk" | Séaghán | M |
| Shea | "hawk-like" | Séaghdha | M |
| Sheen | | Séighín | M |
| Shalvey | having great posessions | Sealbhach | M |
| Synan | dim. of sen, "ancient, old" | Seanán | M |
| Sheedy | perhaps "silk" | Síoda | M |
| Slevin | "mountainy man" | Sléibhín | M |
| Sorley | from Old Norse, "summer-farer, viking" | Somhairle | M |
| Sorcha | "bright, radiant" | Sorcha | M |
| Sweeney | | Suibhne | M |
| Teague | a poet | Tadhg | M |
| Teegan | a poet | Tadhgán | M |
| Turlough | instigator, abettor | Tárlach | M |
| Talley | pacifying, placating | Taichleach | M |
| Tynen | dark | Teimhnín | M |
| Tierney | a lord | Tiarnach | M |
| Tiernan | a lord | Tiarnán | M |
| Tiobrady | | Tiobraide | M |
| Tubrady | | Tiobraide | M |
| Tierachan | possessing much land | Tíreachán | M |
| Tomelty | | Tomaltach | M |
| Twomey | | Tuama | M |
| Toomey | | Tuama | M |
| Tracey | warlike, fierce | Treasach | M |
| Treasaigh | warlike, fierce | Treasach | M |
| Tully | ruler of the people | Tuathal | M |
| Torcan | wild boar | Torcán | M |
| Ulick | dim. of Uilliam (William) | Uilleag | M |
| Walter | borrowing of Old German Waldhar | Uatéar | M |
| Whelan | | Faolán | M |