Traditional Irish Names
Here is the master list of Irish names. These are the names of saints and names from history and myth. The approximate pronunciations are given, as names vary in dialects. It is also difficult to spell out some sounds in the Irish language into English, as certain sounds don't exist in English.
If you haven't done so already, non-Irish speakers please see the the pronunciation guide.
| name | approx. pronounciation | other forms* | meaning |
|---|---|---|---|
| Abbán (m) | OB awn | Abban, Abán | little abbot |
| Ádhamhnán (m) | AH yum nawn | Eunan | the timorous one |
| Aibhne (m) | EV nyeh | Eveny; Aveny | meaning is unknown |
| Ailbhe (m/f) | AL vyeh | Alvy; Ailbe | Either from ail, "rock," albho, "white" or Gaulish albiorix "world king." |
| Ailill (m) | AL yil | Irial, Elias | "elf; sprite" |
| Aillean (f) | AL yan | - | meaning is unknown |
| Aimhirghin (m) | AV ir yin | Amargein, Aimirgin | Born of song |
| Ainbheartach (m) | AN v'yar takh | Ainbertach | doer of evil deeds |
| Áinle (m) | AN l'yeh | Áindle, Ánle | hero, champion, warrior |
| Áine (f) | AW nya | Anya | delight; pleasure |
| Áinfean (f) | AWN f'yun | Ainbthech | storm; fury; violence |
| Ainnir (f) | AN nyir | Ainder | young woman |
| Ainníleas (m) | AN Y'EEL 'yas | Aindíles | has uncertain parentage, perhaps adopted |
| Aithche (f) | AH h'yeh | Atty | meaning is unknown |
| Álmhath (f) | AWL uh va | Alva | meaning is unknown |
| Ámhra (m) | AWV ra | Adamrae | "very wonderful" |
| Ana (f) | A na | Ana; Dana; Anu | "wealth" or "abundance" |
| Anamcha (m) | AN am uh ka | Animosus, Ambrose | spirited |
| Ánrothán (m) | AWN ruh hawn | Anrahan, Hanrahan | either "second-degree poet," "sun-traveller," "champion," or "nobleman second to the king" |
| Aodh (m) | AWD, EE | Áed, Hugh | from Aed, the Celtic god of fire, whose names means, appropriately enough, "fire." |
| Aodhamair (f) | AY mur | - | derived from Aed (see Aodh) |
| Aodhán (m) | AY awn | Aodan; Aidan | diminutive of Aed (see Aodh). |
| Aodnait (f) | AY nut | Enat | Aodh + feminine ending |
| Aoibheann (f) | EE vyin; EE van | Eavan; Aoibhínn | "beautiful radiance" |
| Aoibhegréine (f) | eev GRAIN yeh | Evgren; Aíbgréine | "radiance of the sun" |
| Aoife (f) | EE fa; WEE fa | - | "beautiful; radiant" |
| Aonghus (m) | ENG yus | Angus; Óengus; Áengus, Aeneas | possibly "sole strength" or "true choice" |
| Báine (f) | BAWN yeh | - | "paleness; whiteness" |
| Bairrfhionn (m) | BER in | Berrin, Bairrion, Barry | "fair-haired" |
| Banbha (f) | BAN uh va | Banba | the name of an ealy goddess, and was also used as name for Ireland |
| Bardán (m) | BAR dawn | Bardan | "poet; bard" |
| Baoth (m) | BEE | Baeth | vain; reckless; foolish |
| Beag (m/f) | B'YAG | Becc | little; small |
| Beagán (m) | B'YAG awn | Beccán | small, little lad |
| Bébhinn (f) | BAY vin | Bevan; Bébhionn | fair lady |
| Bearach (m/f) | BAR akh | Berach; Berrach | pointed or sharp |
| Bláthín (f) | BLAW heen | - | little flower |
| Bláthnaid (f) | BLAW nid | Blánaid; Bláthnait | little flower |
| Blinne (f) | BLI nyeh | Monina; Moninne | form of Monnine (see also) |
| Breacán (m) | BREK awn | Breccan | freckled; speckled |
| Breasal (m) | BRAS sal | Brassal Basil | brave or strong in conflict |
| Bríghid (f) | BREED | Bríd; Brigid; Breda ; Bríde | high goddess |
| Brion(m) | BREE un | Brian | noble or high |
| Brocc (m) | BRUK | Brock, Broc | badger or sharp-faced |
| Brógán (m) | BRO gawn | Brogan; Bróccán | meaning is unknown |
| Brónach (f) | BRO nakh | Brona; Bronagh | sorrowful |
| Buadhach (m) | BOO ach | Buach, Buagh, Boethius, Victor | victorious |
| Cairbre | CAR bryeh | Carbry | a fairly common name in medieval Ireland, this name means possibly, "charioteer" or "bearer" |
| Cairell (m) | CA rel | Kerrill; Karel; Coireall, Cyril | ?? |
| Calbhach (m) | COL vakh | Calvagh, Charles | bald |
| Caoilfhionn (f) | KEE lin; KWAY linn | Keelin; Kaylin; Caoilinn; Caoileann | fair and slender |
| Caoimhe (f) | KEE va; KWEE va | Keeva; Keavy | beauty or grace |
| Caoimhín (m) | KEE veen; KWEE veen | Kevin; Cáemgen | beautiful birth |
| Cass (m) | CAS | Cas | curly-haired |
| Cassair (m) | CAS sir | - | curly-haired |
| Cassán (m) | CAS awn | Cassan | little curly-haired one |
| Cathaír (m) | KA heer | Cahir; Cathaoir, Charles | possibly means "battle lord" |
| Cathal (m) | KA hul | Cahal; Cahill, Charles | strong in battle |
| Cathán (m/f) | CA hawn | Cahan; Kane;Cahán | battler |
| Ceallach (m/f) | KAL ukh | Kelly | bright headed |
| Ceara (f) | KYAR a | Cara; Carra | fiery red |
| Cearbhall(m) | KYAR ull | Cearúl, Carroll, Charles | brave in sword-fighting; valorous in battle |
| Cian (m) | KEE in | Keane | ancient |
| Ciar (f) | KEE ir | Keir; Kira;Ciara | black |
| Ciarán (m) | KEE a rawn | Kieran | black |
| Cillian (m) | KIL ee an | Killian; Cillín; Cilléne | church |
| Cináed (m) | KIN awd | Kenneth; Cinneath; Cináeth; Cinnead | possibly from Pictish; meaning is unknown |
| Clíodhna (f) | KLEE uh na | Cliona; Cleana; Clíona | from Celtic mythology; meaning is unknown |
| Coinneach (m sometimes f) | CON yach | Cainneach, Canice, Charles, Kenny | ? |
| Colmán (m) | KUL mawn | Colman; Colm | from Latin; 'dove' |
| Comhghall (m) | KU wull | Cowal; Comgal | fellow hostage |
| Conall (m) | KUL al | Connell; Conal | strong as a wolf |
| Conán (m) | KUN awn | Conan | hound or wolf |
| Conchobhar (m) | KRU hur | Conor; Conchobar | lover of hounds |
| Conlaodh (m) | Kun lee | Conley; Conleth; Conláed | prudent fire |
| Conn(m) | KUN, KOWN | Constantine | Wisdom, chief |
| Cormac (m) | KUR a mac | Cormac | son of the defiler? |
| Coinneach (m) | CON yach | Cainneach, Canice, Charles, Kenny | sorrowful |
| Cuán (m) | KOO awn | Cúán | diminutive of Cu, meaning "hound" |
| Cúmhaí (m) | koo VEE, koo EE | Hughey, Quinton | hound of the plain |
| Curnán (m) | KUR nawn | Curnan | ? |
| Daigh (m) | DEI | Daig | flame; fire |
| Daighre (m) | DEI r'yeh | Daigre | flame, fire |
| Daimhín (m) | DA veen | Davin; Daimíne | deer or ox |
| Dáire (m) | DAW reh | Darragh; Dary Dudley | fruitful; fertile |
| Dáirine (f) | DAW rin yeh | Darina | fruitful; fertile |
| Dáirinn (f) | DAWR inn | Derinn; Doreen; Dorind | daughter of Fionn? |
| Dallán (m) | DAL awn | Dallan | blind |
| Damhnait (f) | DAV nat | Devnet; Davnat; Damhnat | fawn |
| Deaglán (m) | DEG lawn | Declan; Declán | possibly- full of goodness? |
| Dearbhail (f) | DJAR val | Derval | Daughter of Fál (another name of Ireland) |
| Deirbhile (f) | DJIR vil a | Dervla, Dervila | daughter of a poet |
| Deirdre (f) | DAIR dreh | Deirdre; Deedra; Deirdriu | perhaps "chatterer" or could be derived from a name beginning with der- meaning "daughter (of)" |
| Deasmumhnach (m) | DAS moo nach | Desmond, Deasún | man from Desmond (in Co. Cork) |
| Diarmaid (m) | DEER mid | Dermot; Diarmuid; Diarmait | without injunction or envy? freeman? charioteer? |
| Dairinn(f) | DAWR in | Darina, Doireann, Dorind Doreen, Dorothy, Dolly | daughter of Fionn? |
| Domhnall (m) | DUN nal | Donal; Dónal, Daniel | world mighty |
| Donnchadh (m) | DUN a kha | Donagh; Donnacha; Donncha, Dennis, Dionysus | brown lord |
| Dunfhlaith (f) | DUN a la | Dunla; Donnfhlaith; Dunflaith | brown princess |
| Dubhaltach(m) | DOO al tach | Doalty Dudley | dark-limbed, black-jointed |
| Dubhgall (m) | DU gal | Dougal; Dubgall | dark foreigner |
| Dubhghlas (m) | DU las | Douglas | blue black |
| Eadan (f) | AH dan | Etan | - |
| Ealadha (m) | AL a ha | Elatha | art; craft |
| Easnadh (f) | AS na | Esnad | musical sound |
| Eibhear (f) | AY var | Éber, Heber, Harry, Ivor | ? |
| Éile (f) | AYL yeh | - | ? |
| Éirne (f) | AYR nyeh | Erne | ? |
| Éamonn (m) | AY mun | Eamon; Éamann | from English; wealthy guardian |
| Éanna (m) | AY na | Enda | birdlike |
| Earnán (m) | AHR nawn | Ernan, Ernest | iron? |
| Éibhleann (f) | AYV len | Evlin; Ébliu; Éblenn; Éibhliu | beauty; radiance |
| Echna (f) | EKH na | - | steed |
| Éimhín (m & f) | AY veen | Evin; Aeveen; Éimíne | prompt; ready |
| Eirnín (m/f) | ER neen | Ernin; Erníne | iron |
| Eithne (f) | EN a; EN yeh | Enya | kernal or gorse |
| Émer (f) | AY mer | Emer; Éimear; Éimer | ?? |
| Eoghan (m) | OH in | Owen; Eógan | born of the yew |
| Étaín (f) | AY teen | Aideen; Éadaoin | jealousy |
| Fachtna (m and f) | FACHT na | Festus, Festie, Fantasius | malicious; hostile |
| Fainche (f) | FINE kha | Fanny | ?? |
| Faolán (m) | FWAY lawn | Fillan; Fáelán | wolf |
| Fearchar (m) | FAR char | Farquar | friendly |
| Feardorcha (m) | far DUR a cha | Frederick, Ferdinand | dark man |
| Fearghal (m) | FER ul | Farrell; Fergal | manly or valorous |
| Fearghus (m) | FER a ghus | Fergus | strength of a man |
| Fechín (m) | FEH kheen | Fechin; Fechíne | raven or battle |
| Feidhelm (f) | FY elm | Fidelma; Fedelm | ?? |
| Feidhlim (m and f) | FEH lim | Phelim, Felim Felix, Phillip | ? |
| Feme (f) | FE va | - | young woman; girl |
| Féthnaid (f) | FAY nid | Fenit; Féthnat | ?? |
| Fiachra (m) | FEE a khra | Fiacre | battle-king |
| Fial (m) | FEE ul | Feale | modest; honorable; generous |
| Fianait (f) | FEE uh nit | Feenat | wild creature; deer |
| Finnén (m) | FIN yain | Finnian | fair |
| Finnseach (m) | FIN shakh | Finsha; Finnsech | blonde lady |
| Fionn (m) | FYUN | Finn | fair; white |
| Fionnait (f) | FYUN it | Finnat, Fennat | fair-haired; white |
| Fionúir (f) | FYUN oor | Fennore; Fionnbhair; Fionnabair | ghost, spirit |
| Fionnbharr (m) | FYUN var | Finbar | fair haired |
| Fionnghuala (f) | fyun OO la | Fenella; Finola; Fionnuala; Nuala | fair shouldered |
| Fionntán (m) | FYUN tawn | Fintan; Fiontan | white ancient/fire |
| Flann (m/f) | FLAN | Flannacán | fiery red |
| Garbhán (m) | GAR vawn | Garvan ; Garbán | rough |
| Geiléis (f) | gyel AISH | Gelace | bright swan |
| Gilleagán (m) | GIL uh gawn | Gilligan | little lad |
| Giolla Chríst (m) | GYIL la CHREESHT | Christian | servant of Christ |
| Glaisne (m) | GLASH neh | Glasny, Gelasius | green, grey, grey-blue |
| Gobán (m) | GUB awn | Gobban ; Gobbán | smith |
| Gobnait (f) | GUB nit | Gobnet, Deborah, Abbie, Dora | smith |
| Gormán (m/f) | GUR mawn | Gorman | dark; swarthy |
| Gormghiolla (m) | GURM yu la | Gormgiolla | grey servant |
| Gormlaith (f) | GUR um la | Gormley | blue/illustrious princess |
| Gráinne (f) | GRAW nya | Grania, Grace, Gertrude, Griselda | inspiring terror; grain |
| Grian (f) | GREE un | - | sun; sun-goddess |
| Iarfhlaith (m) | EER la | Jarlath; Iarlaith; Iarla | western kingdom? |
| Iarlugh (m) | EER loo | Iarlug | combination of Iar + Lug (Celtic god names) |
| Íde (f) | EE deh | Ita; Íte | act of eating |
| Iobhar (m) | EE ver | Ivar | yew tree |
| Iomchadh (m) | UM uh cha | Imchad | ? |
| Íonait (f) | EEN nit | Enat | faithful; pure; sincere |
| Irial (m) | EER eeyal | Irél | ? |
| Labhraidh (m) | LA ra | Lowery; Labraidh | speaker |
| Labhrás (m) | LAV raws | Labrás | laurel bush |
| Lachtna (m) | LACHT na | Lucius | milk-white, milk-like |
| Lachtnán (m) | LACHT nawn | Lawton | milk-white, milk-like |
| Laisrén (m) | LAS rain | Laisréan | flame |
| Laoidheach (m) | LEE ach | Laídech | songful; poetic |
| Laoire (m) | LAY reh | Laoghaire, Leary | calf-herd |
| Laoise (f) | LEE sha | - | radiant girl |
| Lasair (m) | LA sar | Lassar | flame, fire |
| Lasairfhiona (f) | la sar EE na | Lasarina; Lasairíona | flame wine |
| Leannán (m) | LYUH nawn | - | sweetheart |
| Líadan (f) | LEE a dan | Liadan; Líadáin; Líadain | grey lady |
| Liamhain(f) | LEE uh vin | - | comely, beautiful |
| Life (f) | LIF yeh | Liffey | ? |
| Líobhan (f) | LYEE von | Lí Ban | beauty of women |
| Lochlann(m) | LAKH lin | Laughlin, Lochlan, Lachlan, Laurence | a Viking |
| Lomán (m) | LUH mawn | Loman; Lommán | bare |
| Lonán (m) | LUH nawn | Lonan | blackbird |
| Lorcán (m) | LUR cawn | Lorcan; Lorccán | cruel or fierce |
| Lughaidh (m) | LOO ee | Lúí, Louis, Aloysius, Lewy | light; brightness |
| Luiseach (f) | LWEE shach | Luisech, Lucy | radiant girl |
| Mac Nisse (m) | mok NISH seh | - | son of Ness (goddess name) |
| Mac Táil (m) | mok TAWL | - | son of adze |
| Maeleachlainn(m) | mal LACH lan | Malachy | servant or devotee of St. Seachnall |
| Mainchín (m) | MAN cheen | Munchin, Mannix | monk |
| Maine (m) | MAN yeh | Many | ? |
| Mael Íosa (m) | mal EE sa | Maelisa | servant of Jesus |
| Maolán (m) | MAYL awn | Mullen | warrior |
| Maol Mhuire (m & f) | mal WIR eh | Murray, Miles, Milo, Myler | servant or devotee of St. Mary |
| Maon (m & f) | MAYN | - | silent |
| Marcán (m) | MAR kawn | Marcan | steed |
| Marga (f) | MAR ga | - | ? |
| Meadhbh (f) | MAVE | Maeve; Medb; Méabh, Marjorie | she who intoxicates |
| Meallán (m) | MEL awn | Mellan | lightening |
| Meallá (f) | MYEL a | Mell, Mella | lightening |
| Mel (m) | MEL | Mel | ?? |
| Miach (m & f) | MEE ach | - | honorable; proud |
| Mochta (m) | MUCH ta | - | great |
| Moinnine (f) | muh NIN yeh | Monina; Blinne | My ninne- ninne was the first word this saint spoke |
| Móirne (f) | MORN yeh | Maria, Maud | great |
| Molaisse (m) | muh LAWSH a | Molaise | pet from of Laisrén ("flame; fire") |
| Moncha (f) | MUN cha | Monica | from a Celtic goddess name |
| Mór (f) | MORE | Moreen; Móirín Martha, Mary, Agatha | great |
| Morann (m) | MuL an | Morand | ? |
| Muadhnait (f) | MOO nit | Monat; Mona; Muadnat | noble; good |
| Muircheartach (m) | MWIR char tach | Briartach, Murtagh, Mortimer, Maurice, Monty | sea battler |
| Muireann (f) | MWIR in | Murren; Maren; Mairenn; Muirfhionn, Marion, Madge | sea fair |
| Muireadhach (m) | MWIR akh | Murray; Murdough Muiríoch | lord; master |
| Muirín (f) | MWIR in | Miren; Muirín | born of the sea |
| Muirgheal (f) | MWIR yal | Muriel; Muirgel | sea-bright/ sea-white |
| Muirne (f) | MWIR nyeh | Myrna | high spirited; festive |
| Murchadh (m) | MUR a kha | Murrough | sea battler |
| Murchú (m) | MUR choo | Murphy | hound of the sea |
| Naithí (m) | NAH hee | Nath-í, Nathy | ? |
| Naoise (m, sometimes f) | NEE sha | Nóise, Naois, Nyce, Noah | bond? |
| Naomh (f) | NAV, NEV | - | saint |
| Naomhán (m) | NEV awn | Nevan | dim. of Naomh ("saint") |
| Nárbhflaith (f) | NAR vila | Narvla, Narbflaith | noble princess |
| Neacht (f) | NYACHT | - | pure |
| Neamhain (f) | NYAV in | Nemon | battle-fury; warlike frenzy: name of a Celtic war goddess |
| Neasa (f) | NES sa | Nessa, Neas, Ness | not gentle |
| Neasán (m) | NYAS awn | Nessan | Stoat? |
| Niall (m) | NEE ul | Neil, Neal, Néill, Nicholas, Nigel | cloud or passionate; vehement |
| Niallán (m) | NEE ul awn | Neylon, Nealon | dim. of Niall (cloud or passionate; vehement) |
| Niamh (f) | NEEV, NEE uv | Niav, Niam | brightness; radiance |
| Nuadha (m) | NOO a | Nuadu | possibly, "cloud-maker": Celtic god name |
| Nuala (f) | NOO uh la | Fionnuala, Penny, Penelope | short of Fionnuala (white shoulders) |
| Odhrán (m) | UR awn | Oran, Odrán, Órán | sallow |
| Ógán (m) | OH gawn | Hogan | youth; lad |
| Oilithir (m) | ULL ih hir | Ailithir | pilgrim |
| Oilleóg (m) | ILL yoge | Oilléog | dim. of Oillil ("sprite; elf") |
| Oillill (m) | UHL yil | Aillill, Elias | sprite; elf |
| Oillín (m) | UHL yeen | Ellén, Aillén | little sprite; elf |
| Oisín (m) | USH een | Ossian, Oissíne | little deer |
| Olcán (m) | UL cawn | - | wolf |
| Ólchobhar (m) | OLE chur | Ólchobar | lover of drink |
| Onchú (m) | UN choo | - | fierce hound |
| Órlaith (f) | OR la | Orla, Órla, Orfhlaith | golden princess |
| Órnait (f) | OR nit | Ornat, Orna, Odharnait, Odarnait | sallow |
| Orthanach (m) | UR han ach | - | potent in prayers or charms |
| Osán (m) | US awn | Ossán | little deer |
| Osgar (m) | US gar | Oscar | deer lover |
| Osnait (f) | US nit | Ossnat | deer |
| Rathnait (f) | RAH nit | Ronit, Renny | grace; prosperity |
| Ríofach (f) | REE uh fakh | Ríomthach, Ríomhthach | ? |
| Ríoghán (m) | REE awn | Ryan, Rian, Rígán | little king |
| Ríona (f) | REE uh na | Ríonach, Regina | queenly |
| Ríordán (m) | REE ur dawn | Reardan | royal poet |
| Robhartach (m) | RO ar takh | Robartach | "rushing; impetuous" |
| Róinseach (f) | RONE shach | Róinsech | seal |
| Róisín (f) | RO sheen | Rosheen, Rosaleen | originally comes from Norse word for "horse." Also means "little rose." |
| Rónán (m) | RO nawn | Ronan | little seal |
| Rónnad (f) | RONE it | Rónnat | seal |
| Rós (f) | ROS | Rose | 'rose' is the modern meaning, but originally it came from a Norse word for "horse" |
| Ross (m) | RAWS | Ros | headland |
| Rúadhán (m) | ROO awn | Ruan, Rowan, Rohan, Rúadán | red haired |
| Rúadhnait (f) | ROO uh nit | Rúdnat | red-haired |
| Ruaidhrí (m) | RU a ree | Rory, Ruairí, Ruaidrí, Roderick, Roger | red king |
| Ruarc (m) | ROO ark | Rourke | hero; champion |
| Sadhbh (f) | SIVE | Sive, Sadbh, Sophie, Sophia, Sarah, Sally, Sabia, Sabina | sweet, goodly |
| Samhradhán (m) | SOW rawn | Samradán | summery person |
| Saorla (f) | SEER la, SAYR la | Saorlaith | noble queen |
| Saraid (f) | SAR ad | Sárait, Sarah | excellent, best |
| Sárán (m) | SAWR awn | - | chief, noble; best |
| Sárnait (f) | SAWR nit | Sárnat | chief, noble; best |
| Scannal
(m) |
SKAN al | Scandel, Scannell | possibly, "quarrel; argument" |
| Scannlán
(m) |
SKAN uh lawn | Scanlon, Scandlán | diminutive of Scannal |
| Scáthach
(m) |
SKAW hokh | - | shadowy; ghostly; frightening |
| Scoithín (m) | SKUH heen | - | blossom, bloom |
| Scoithniamh (f) | SKUH nyee uv | Scothniam | shining; radiant blossom |
| Scolaí (m) | SKUL lee | Scolaighe, Scully | town crier, scholar |
| Scoth (f) | SKUH | - | blossom, bloom |
| Scothnait (f) | SKUH nit | - | blossom, bloom |
| Sé (m) | SHAY | Séaghdha, Shay, Shea | hawk-like, noble |
| Seachlann (m) | SHACH lan | Sechnall, Seachnall | from Latin "secondus" |
| Séadhna (m) | SHAY uh na | Sétna, Séadna, Sidney | traveller; wayfarer |
| Séanait (f) | SHAI nat | Ségnat | hawk |
| Seanán (m) | SHAN awn | Senan | old, ancient |
| Seanchán (m) | SHAN a khawn | Shanahan | old, ancient |
| Searc (f) | SHARK | Serc | Love; affection |
| Séighín (m & f) | SHAY een, SHANE | Séigíne | hawk |
| Síoda (m) | SHEE da | Sheedy | possibly derived from the word for "silk" |
| Siollán (m) | SHULL awn | Sillán | ? |
| Síomha (f) | SHEE va | Sheeva, Síomhaith | good peace |
| Sláine (f) | SLAW nyeh, SLAWN ya | Slaney, Slanina | health, from a Celtic goddess name |
| Sléibhín (m) | SHLAI veen | Slébíne, Slevin | mountain man |
| Somhairle (m) | SO ar leh | Sorley, Samuel, Charles | from Norse, summer wanderer |
| Sorcha (f) | SUR a ka | Sarah, Sally | bright, radiant |
| Suaibhseach (f) | SOO uv shach | gracious; kindly | Suaibsech |
| Suanach (f) | SOO un ach | - | drowsy |
| Suibhne (m) | SIV neh | - | well-going |
| Tadhg (m) | TYG | Teague, Tadc, Tadg, Tad, Thaddeus, Theodosius, Theophilus, Tim | poet |
| Taichleach (m) | TAL akh | Tallach | placating; peacemaking |
| Taillte (f) | TAL tyeh | Teltina, Tailltiu | ? |
| Tanaí (m) | TAHN ee | Tanaide | slender; subtle |
| Tassach (m) | TASS ukh | - | perhaps, "idle; inactive" |
| Teafa (f) | TYEF a | Tethba, Teffia | ? a place name in Co. Longford |
| Teamhair (f) | T'YA wur | Tara, Teamair | elevated place |
| Téide (f) | T'YAY d'yeh | Téite | wantonness |
| Teimhnín (m) | T'YEV uh neen, T'YEN een | Temnén | dark |
| Tighearnach (m) | TEER nakh | Tierney, Tiarnach | lord |
| Tighearnán (m) | TEER nawn | lord- Tiernan, Tiarnán | lord |
| Tiobraide (m) | TYUB rid eh | Tipraite | ? |
| Tíreachán (m) | TEER ach awn | Tírechán | having land; wide-ruling |
| Toirdhealbhach (m) | TUR a lakh | Turlough, Tairdelbach, Charles | abettor |
| Tóla (m) | TOE la | Tola | abundance, flood |
| Tomaltach (m) | TUM al tach | Thomas, Timothy | ? |
| Tómmán | TOME awn | - | dim. of Tuama |
| Torcán (m) | TURK awn | Torccán | wild boar |
| Torna (m) | TOR na | - | puffed-up? |
| Treasa (f) | TRA sa | Tressa, Trása, Teresa | strength |
| Treasach (m) | TRAS ach | Tressach, Tracy | warlike; fierce |
| Tuama (m) | TOO uhm ma | Tómma | ? |
| Tuamnait (f) | TOO um nit | Tómnat | fem. of Tómmán |
| Tuathal (m) | TOO uh hul | Toal, Tully | ruler of the people |
| Tuathla (f) | TOO uh la | Tuathflaith, Tuathfhlaith, Tuala | princess of the people |
| Tuileach (f) | TIL yakh | Tailech | perhaps, "prominent forehead" |
| Tuilelaith (f) | TIL yeh la | Tailefhlaith, Tallula, Twilleliah | lady of abundance; abundance of sovereignty |
| Uaine (f) | OO in yeh | - | green |
| Uainionn (f) | OO in yin | Uanfind | foam-white complexioned |
| Uaine (f) | OO in yeh, WAN yeh | - | greenish, from a tribal name |
| Uasal (f) | OO a sal | - | noble |
| Uaithne (m) | OO in yeh, WAN yeh | Owney, Hewney, Anthony | greenish, from a tribal name |
| Uallach (f) | OOL akh | proud; arrogant | |
| Uallachán (m) | OOL akh awn | Hoolihan | little proud; arrogant one |
| Uallgarg (m) | OOL a garg | - | fierce pride |
| Ultán (m) | UL tawn | Ultan | Ulsterman |
| Úna (f) | OO na | Una, Oona, Oonagh, Agnes, Winifred, Winnie, Juno | ? |
| Urard (m) | UR urd | Airard, Irard | very tall |