Parents are so happy that they can not express their happiness when they are in parenthood. Parents plan about the baby name and take a beautiful name for the baby, which is the most important and lovely experience of parenthood. Momion always tries to give a unique and extraordinary resource for mom & dad. If you are looking for a name for your baby which is similar to Irish you are in the right place. Irish people spoke in Goidelic language and according to their tradition, most of the Irish names are in the Goidelic words. But don’t be afraid if you don’t understand Goidelic language, we have listed the names with meanings. We have a list of Irish baby boy names with meanings as well as have a list of Irish girl names too. If you are searching for a boy name from Irish here the list of more then 1400 names:
A to Z List of Irish Names for Boys:
- Aaron: It means “High Mountain”
- Abbán/Abán: Little abbot
- Adam
- Adare
- Adhamh
- Adhamhnan
- Adhamhnán: Timorous one
- Adhnár/Adnár: It means “Very Modest”
- Adomnan/Adomnán: It means “Timorous One”
- Adyn
- Aed
- Aedan: Born of fire
- Aedh: It means “Fire”
- Aeneas
- Aengus: It means “Great strength”
- Aghaderg: From the red ford
- Ahearn: Ahearn means “Steward”
- Aibhstín
- Aichear
- Aichear/Aicher: Keen
- Aidan: Little fire
- Aidhleart
- Aidrean
- Aigleach: Ready
- Ailbe/Ailbhe: Bright
- Ailbhín
- Ailchú: Gentle hound
- Ailellán: Sprite
- Ailill
- Ailillán
- Ailin: Handsome
- Ailithir: A pilgrim
- Ailéin
- Aimhirghin
- Aimirgin
- Ainbheartach
- Aindriú
- Aindréas
- Ainmere/Ainmire: Leader
- Ainéislis
- Ainéislis: It means “Stanislaus”
- Airard: Very tall
- Airbertach/ Airbheartach : Ingenious
- Airechtach: It means “Having many followers”
- Airleas: Pledge
- Airthaile: Plenty
- Airttíne
- Al/Alan/Allen: Handsome
- Alabhaois
- Alans
- Alaois
- Alban: It means rock
- Albanach
- Albert: It means “noble or bright”
- Alex
- Alexander
- Alfie
- Allan: It means “Harmony”
- Alleyne: Cheerful
- Alphonsus: Ready
- Alroy: Red head boy
- Alsander
- Alusdar
- Amargein
- Amblaoibh: Relic
- Ambros: It means “Immortal”
- Amon
- Anamcha/Anmchaid : Spirited
- Andrew
- Aneislis
- Anfudán: Fiery person
- Angus
- Anluan: Champion
- Anlón: Warrior
- Annaduff
- Annraoi
- Anraí
- Antaine: Praiseworthy
- Anthony
- Antóin
- Aodghan: Little fire
- Aodh/Aodhan : It means fire
- Aodhach
- Aodhagán
- Aodhal
- Aodhan
- (Fire)
- Aodhfin/Aodhfoinn: It means “White Fire”
- Aoi: Learning
- Aoidhghean
- Aonas
- Aonghus
- Aongus: One strength
- Aralt: Leader
- Ardagh
- Ardal
- Ardan: High inspiration
- Ardgar/Artgal: Fierce one
- Ardghal
- Ardghal: It means “High valour”
- Ardkill
- Arlen
- Arrachtán: Vigorous
- Art/Artagán/Arthur/Artucán/Artán: Champion
- Artegal: High honour
- Arthgallo: Courageous
- Artúr
- Augaire
- Aurchlossach: Reputable
- Aurthuile: Plenty
- Awnan
- Aymon
- Aí: Learning
- Baccán: It means little man
- Baethan: Foolish
- Bailintin: It means valiant
- Bain
- Bain: Fair-haired
- Bainbridge
- Baird: Bard
- Bairn: Child
- Bairre/ Bairrfhoinn/ Bairríonn: It means bairre
- Bairtliméad (Irish form of Bartholomaeus)
- Baiste: Holy
- Banan: It means “White”
- Banbhan: A piglet
- Banning
- Bannon
- Baoithín/Baoth: wreckless
- Bard: A poet
- Bardo
- Bardon
- Bardán
- Baris
- Barr: point
- Barra
- Barram: Handsome
- Barree
- Barrey
- Barry: Saint Barry
- Bayne
- Baz
- Bazz
- Beagan
- Beagan: Little one
- Beagen
- Beagin
- Beanón: Benign
- Bearach
- Bearach: Sharp
- Bearnárd
- Beartlaidh
- Beattie: Provider
- Becan: Little one
- Beckett
- Beegan
- Beegan
- Beegin
- Behan: It means “Bee”
- Behellagh
- Beircheart: Shining army
- Beirgin: It means “Soldier”
- Ben
- Benen: Kind
- Benjamin
- Beoaodh
- Beolagh: Foolishly brave
- Berach: It means “Sharp”
- Bercnan
- Bhalronta
- Billy
- Blaine
- Blaine: Thin
- Blair: It means “From the plain”
- Blar: It means “From the fields”
- Blathma
- Blian: It means thin
- Blámhac: Famous
- Bobby
- Boetius
- Bohannon: It means “Son of Owen”
- Boine: White cow
- Boyde
- Boyn
- Boyne
- Bradach
- Bradaigh: Spirited
- Bradden
- Braddon
- Braden
- Bradey
- Brady
- Brady
- Braeden
- Braedy
- Braiain
- Braidie
- Brain
- Bran: Raven
- Branacán: Brannigan
- Brandan: It means “Sword”
- Brandon: Brave
- Brandub
- Brann/Brannagh: Raven
- Branna
- Brannen
- Brannon
- Braná
- Braoin: Sadness
- Braydan
- Brayden
- Braydie
- Braydon
- Brazil
- Brea: Hill
- Breac: Freckled
- Breacán: Little freckled one
- Breandan
- Breas: Beautiful
- Breasal/Bresal/ Bressal: It means “A war”
- Breatnach
- Breck: Freckled
- Breed
- Brenan
- Brendan
- Brendano
- Brenden
- Brendin
- Brendon
- Brennan: Little raven
- Brennen
- Brennin
- Brennon
- Briain/Brian: Noble
- Brian
- Brian
- Briano
- Briant
- Briartach: Skilled seaman
- Bricín
- Brien
- Brin
- Brion
- Brodee
- Broden
- Broderic
- Brodey
- Brodie: A ditch
- Brody
- Brogan
- Broggan
- Brosedy
- Bruadar
- Brugach
- Bryden
- Brye
- Bryen
- Bryent
- Bryon
- Bréanain: A prince
- Bríon: Noble
- Buach/ Buadh/ Buadhach/ Buagh: Victorious
- Buan: Enduring
- Buchanan
- Buckley: A boy
- Burne: From the brook
- Burnell: Strong as a bear
- Béoán
- Búadach: Victorious
- Cace
- Cadán/ Cadell: Little battle
- Cadhla
- Cagney
- Cahan
- Cale
- Calhoun
- Callahan
- Callhoun
- Callum
- Calum
- Cameron
- Canaday
- Canady
- Caoimhín
- Carlow
- Carlowe
- Carnahan
- Carney
- Carny
- Carollan
- Carrick
- Case
- Cassidy
- Cathal
- Cathasaigh
- Cattlin
- Cavan
- Charlie
- Christopher
- Cian
- Ciaran: Saint Ciaran
- Cillian
- Clancey
- Clancy
- Claney
- Cleary
- Cluny
- Coby
- Cochran
- Codell
- Colhoun
- Colin
- Collins
- Collumbano
- Colm
- Colman
- Colombain
- Colquhoun
- Columbano
- Columbanus
- Columcille
- Comhghall
- Conan
- Conchobhar
- Conlan
- Conlen
- Conlin
- Conlon
- Conn
- Connell
- Conner
- Connlyn
- Connor
- Conor
- Conroy
- Conyngham
- Conán
- Corcoran
- Cork
- Cormac
- Cormack
- Corrick
- Corridon
- Cosgrave
- Cowal
- Cowan
- Coyle
- Craig
- Cronan
- Cullan
- Cullen
- Culley
- Cullin
- Cullinan
- Cully
- Cunningham
- Cunninghame
- Curragh
- Curran
- Currey
- Currie
- Curry
- Cáel
- Dagen
- Dahey
- Dahy
- Dailey
- Daily
- Daire
- Dalan
- Daley
- Dallan
- Dallen
- Dallon
- Dalon
- Dalvwin
- Dalwyn
- Daniel
- Danny
- Dara
- Darach
- Daragh
- Daren
- Dargan
- Darragh
- Darran
- Darren
- Darrin
- Darring
- Darroch
- Darrock
- Darron
- Darryn
- Darsy
- David
- Dawayne
- Dawley
- Deaglan
- Dean
- Declan
- Deegan
- Delavan
- Dellwin
- Delvin
- Delvon
- Delwin
- Delwynn
- Dempsey
- Dempsy
- Denis
- Dermot
- Dermott
- Derrie
- Desmond
- Desmund
- Devine
- Devinn
- Devland
- Devlen
- Devlin
- Devlon
- Devlyn
- Devyn
- Dewain
- Dewayne
- Dezmond
- Diarmaid
- Diarmait
- Diarmi
- Diarmid
- Diarmuid
- Diarmuld
- Dilan
- Dillen
- Dillon
- Dillon: Hope
- Dilon
- Docherty
- Doherty
- Dolan
- Donagh
- Donahoe
- Donahue
- Donal
- Donavan
- Donavon
- Donevin
- Donevon
- Donnacha
- Donncha
- Donnchadh
- Donohoe
- Donohue
- Donovan
- Donoven
- Donovon
- Doogan
- Dooley
- Dorrance
- Dorrel
- Dorrell
- Dorren
- Dorrin
- Dougan
- Douggan
- Dougherty
- Douherty
- Dow
- Dowe
- Dowson
- Doyle
- Duald
- Duante
- Duayne
- Dubhan
- Dugan
- Duggan
- Duwain
- Duwaine
- Duwayne
- Dwain
- Dwaine
- Dwane
- Dwayne
- Dwire
- Dwyer
- Dylan
- Dáire
- Dáithí
- Eagan
- Eagen
- Eaman
- Eames
- Eamon
- Eamonn
- Eanna
- Edward
- Egan
- Egann
- Eiltíne
- Emmanuel
- Emmet
- Emmett
- Emmons
- Eoghan: Well born
- Eoin
- Eri
- Eric
- Ethan
- Evan
- Ewen
- Fabio
- Fachtna
- Fagan
- Fagin
- Faolan
- Farrel
- Farrell
- Farrill
- Farrish
- Farryll
- Favio
- Fearghal
- Fearghall
- Fegan
- Feggan
- Feidhlim
- Felan
- Felim
- Fergall
- Ferrel
- Ferrell
- Ferrill
- Ferrin
- Ferris
- Ferriss
- Ferryl
- Fiachra
- Fiacre
- Filip
- Fin
- Finan
- Finbar
- Findlay
- Findley
- Finegan
- Fingal
- Fingall
- Finian
- Finlay
- Finlea
- Finlee
- Finley
- Finn
- Finnbar
- Finnbarr
- Finnbarr: It means “Barry”
- Finnegan
- Finnian
- Finnlea
- Finnley
- Fintan
- Fionan
- Fionn
- Fionnbharr
- Flainn
- Flann
- Flannan
- Flin
- Flinn
- Flyn
- Flynn
- Forgael
- Fursey
- Fíngin
- Gaell
- Gaelle
- Gaer
- Gaille
- Gaine
- Gainer
- Gainor
- Gair
- Galbrait
- Galbraith
- Galbreath
- Gall
- Gallagher
- Gallbraith
- Gallbreath
- Gallchobar
- Gallven
- Gallvin
- Galvan
- Galven
- Galvin
- Galvon
- Galway
- Gannon
- Garan
- Garen
- Garin
- Garion
- Garon
- Garran
- Garren
- Garrin
- Garron
- Garrvey
- Garrvie
- Garve
- Garvey
- Garvie
- Garvy
- Gary
- Gavin
- Gaynnor
- Geir
- George
- Gerard
- Geron
- Ghillie
- Gilchrist
- Gilderoy
- Gildray
- Gildroy
- Gilean
- Gillaspie
- Gillchrist
- Gillean
- Gillen
- Gilleon
- Gillespie
- Gilley
- Gillion
- Gillmore
- Gillmour
- Gillon
- Gillray
- Gillroy
- Gillucan
- Gilman
- Gilmore
- Gilmour
- Gilray
- Gilroy
- Girvan
- Girven
- Girvin
- Girvon
- Gleann
- Glen
- Glendale
- Glendyn
- Glennard
- Glennon
- Glenny
- Glinn
- Gorman
- Gradea
- Gradee
- Graden
- Gradey
- Gradon
- Grady
- Graidey
- Graidy
- Guthree
- Guthrey
- Guthrie
- Guthry
- Hagen
- Haggan
- Harkan
- Harken
- Harkin
- Harry
- Henry
- Hewney
- Hogan
- Houston
- Hugh
- Hugo
- Hurlee
- Hurleigh
- Hurley
- Hurly
- Huston
- Hutcheson
- Hutchinson
- Ian
- Iarlaith
- Iarlugh
- Illann
- Iobhar: Spear hard
- Iollan
- Ion
- Ionatán
- Irish
- Irél
- Isaac
- Ivar
- Ivor
- Iárad
- Iósua
- Jack
- Jacob
- Jake
- Jakub
- James
- Jamie: Supplanter
- Jarlaith
- Jarlath: It means “Prince”
- Jarleath
- Jarmy: Charioteer
- Jason
- Jayden
- John
- Jonathan
- Jordan
- Joseph
- Josh
- Joshua
- Justin: It means “Judicious”
- Kacper
- Kael/ Kaelen: Mighty Warrior
- Kaelin: Rejoicer
- Kagan
- Kahan
- Kahane
- Kai
- Kaiden: Warrior
- Kain/ Kane/Kayne/Kean: Warlike
- Kaine
- Karl
- Kasey
- Kasey: Vigilant
- Kathel: It means “A battle ruler”
- Kattlin
- Kavan
- Kayden
- Kayven
- Keagan
- Keagen
- Kealan
- Keallan
- Keallin
- Keane: Ancient
- Kearie
- Kearn
- Kearne
- Kearney
- Kearns
- Keary
- Keefe: It means “Handsome”
- Keeffe
- Keegan: Determined
- Keeghan
- Keeley: It means “Beautiful”
- Keelin: Slender
- Keen
- Keenan
- Keene
- Keenen
- Keenon
- Keeran: It means “Dark”
- Kegan
- Keillan
- Keiran
- Keiron
- Keith
- Keith
- Kelan: Slender
- Kellach: It means “Strife”
- Kellagh
- Keller: Little companion
- Kelly: It means “Warrior”
- Kelton: A Town Of Celts
- Kelvan: River Man
- Ken/ Kenneth/Kenny: Handsome
- Kennady
- Kennan
- Kennedey
- Kennedy: It means “Royal”
- Kennet
- Kennett
- Kennith
- Kennon
- Kenrich: Royal Ruler
- Kenyon: White-haired
- Keon
- Kermit: Free man
- Kern: Little dark one
- Kernaghan
- Kernan
- Kernohan
- Kerrin/ Kieran/ Kerry: It means “Dark”
- Kervin
- Kervyn
- Kerwin
- Kerwinn
- Kerwyn
- Kevan
- Kevan: Beautiful Child
- Keven
- Keveon
- Kevin
- Kevin
- Kevinn
- Kevion
- Kevis
- Kevon
- Kevron
- Kian
- Kiefer: Beloved
- Kienan
- Kienen
- Kiernan
- Kieron: Black
- Kierren
- Kierrin
- Kierron
- Kilean
- Kilian: Church
- Killean
- Killian
- Kinnaird
- Kinnard
- Kinnard
- Kinnell
- Kirwan
- Kirwen
- Konan/ Kynan : Wise
- Korcoran
- Kyle
- Kyllion
- Labhcas: Light
- Labhraidh: It means speaker
- Labhrás
- Labraid: It means “Speaker”
- Labrás
- Lachlan
- Lachtin/ Lachtna/Lachtna: It means “Milk coloured”
- Laird: Head of household
- Lairgnen
- Laisréan: Flame
- Lakyle: It means “Half wood”
- Lalor: Leper
- Lany: Servant
- Laoghaire: Shepard
- Laoidheach: Poetical
- Laoidhigh: Poetic
- Laoire: Calf-herd
- Laoiseach: It means “Man of Laois”
- Laris
- Larkin
- Laughlin
- Lawler
- Lawlor: Soft-spoken one
- Lawton: Milk coloured
- Laígsech
- Leachlainn
- Leaitheanach
- Leannán: It means “Sweetheart”
- Leary
- Leaschulainn
- Leaslaoi
- Leathlobhair: Leper
- Lee: It means “Poetic”
- Leenock: A Leinsterman
- Leith: It means wide
- Lennon: A little cloak
- Lennan
- Leo
- Leocháin
- Leon
- Lesley: Grey fortress
- León
- Liadhnan
- Liadán
- Liam
- Lionard
- Lir: A mythical king
- Llewelyn: It means “Ruler”
- Llyr: It means “A mythical king”
- Lochlain: Viking
- Lochlainn
- Lachlan
- Lochlan
- Logan
- Logan: Small cove
- Loinnir: Radiance
- Lollar
- Loller
- Loman
- Loman: Enlightened
- Lonn
- Lonán: Little blackbird
- Lorcan
- Lorccán
- Lorne
- Loughlin: It means “Servant”
- Luca
- Lucas
- Lug: Irish God
- Lugaidh: Famous warrior
- Lugan
- Lugh
- Luigsech
- Luke
- Lun/ Lunn: Strong
- Luxovious
- Luíseach
- Lyall: Loyal
- Lyam
- Lysagh
- Lí
- Lóegaire
- Lúcás
- MacCoinnigh
- MacCowan
- MacCowen
- MacCrae
- MacCray
- MacCrea
- MacGee
- MacGhee
- MacGuire
- MacSéamais
- Macbride
- Macbryde
- Maccoy
- Macfarlane
- Macgowan
- Mackensie
- Macmahon
- Macmurray
- Macrae
- Madison
- Madóc
- Maeleachlainn
- Magee
- Mago: Great
- Magowan
- Maguire
- Mahon: A bear
- Mahoney
- Mainchin: Little monk
- Maine: It means “Many:
- Mairtín: War like
- Maitiu
- Malachi
- Malachy
- Malcolm
- Manchain: Monk
- Mane: Great
- Mannix
- Mannus/ Manus: Great one
- Maodhog
- Maol Mhórdha
- Maolcholaim
- Maolán: It means “Great warrior)”
- Maonaigh: Wealthy
- Marcas
- Marcus
- Marcán
- Mark
- Marmaduke
- Martin
- Mason
- Mathghamhain/ Mathúin: Bear
- Matthew
- Max
- Mayo
- McBride
- McGee
- McGowan
- McGown
- McGuire
- McGwire
- McMahon
- McMurray
- Mccrea
- Mckensie
- Meallán/ Mellan: Lightning
- Meiscill
- Meldan
- Mellen
- Mellin
- Mellon
- Melvin
- Melvyn
- Merric/ Mervin: Loves the sea
- Miach: Medic
- Michael
- Mike
- Miles: Servant
- Mochta: Great
- Molaisse: It means “fire”
- Molan
- Monahan
- Moriarty: Sea warrior
- Morrissey: Choice of the sea
- Mortimer:Dead sea
- Muadhan: Good
- Muircheartach: Mariner
- Muirchertach: Mortimer
- Muireadhach: Master
- Muiris: Dark skinned
- Muirín: Born of the sea
- Mukonry: Hound of prosperity
- Mulcahy: Battle chief
- Munchin
- Murchadh: It means “Sea warrior”
- Murfee
- Murfey
- Murfie
- Murphee
- Murphey
- Murphie
- Murphy: Warrior of the sea
- Murray: Lord of the sea
- Murrough: Sea warrior
- Murtagh: It means “Mariner”
- Myles: Servant
- Máelechlainn
- Máenach
- Méasaí
- Mícheál: Who is like God
- Naoise
- Nathan
- Neachtan
- Neal/ Neale/ Neil/ Neill: Champion
- Neall
- Nealle
- Nealon
- Neilan
- Neils
- Neilson
- Nevan
- Nevin
- Nial
- Nicolás
- Niel
- Nigellus
- Niguel
- Nijel
- Nile
- Niles
- Njal
- Noah
- Nolan: It means “Famous:
- Nollaig
- Nolyn
- Nygel
- Nóe
- O’Brien
- O’Keefe
- O’Shay
- O’Shea
- Ockan
- Ockey
- Odanadan
- Odhran
- Odhran/ Odran: Sallow
- Odhrán
- Odran
- Oenghus: Excellent Strength
- Oilibhear: Heir To His Ancestors
- Oilithir: Pilgrim
- Oilleóg/ Oillil/ Oillill: Elf
- Oisin: A legendary figure
- Oistín
- Oisín: Little Deer
- Olan: Royal Forefather
- Olchobhar: Lover Of Drink
- Olcán: Wolf
- Oliver
- Ollie
- Onan:Wealthy
- Onchú: Fierce Hound
- Oneal
- Oran
- Oren
- Orenthal
- Orin: Dark Haired
- Orran
- Orran: Pale-Skinned
- Orren
- Orthanach: Potent In Prayers
- Oscar
- Osgar/ Oskar/ Ossian: Deer Lover
- Osheen: Young Deer
- Osán: Little Deer
- Owen
- Owney
- Paddy
- Paddy: Nobleman
- Padraig: Noble
- Padriac:Nobleman
- Parthalan
- Parthalán
- Pat: Nobleman
- Pathalan
- Patrick
- Patryk
- Paul
- Peadar
- Peatáin
- Peter
- Phelan: Brave
- Phelim
- Philip
- Phinean
- Phinian
- Pierce
- Pilib
- Pol: Small
- Preastún
- Proinséas
- Páidín
- Quaid
- Quigley
- Quillan
- Quillen
- Quindlen
- Quinlan
- Quinlan: It means “Athletic”
- Quinn: Wise
- Quinnell
- Radhulbh: Wolf Counsellor
- Radmund: Protector
- Raferty: Prosperity wielder
- Ragahallach: Valiant
- Ragallach
- Raghallaigh
- Raghnall : Wise
- Ragnall
- Ragnvald: Powerful Judgement
- Raighne: Mighty
- Randal: Shield rim
- Rannal: Mighty
- Raymond/ Reamonn: Decision protector
- Raymun/ Reamann: Wise protector
- Reagan
- Reardan: Minstrel
- Rearden: Poet
- Rechtabrat: Straight browed
- Redmond
- Reece
- Reegan: Heir
- Reel
- Regan: Descendant of a king
- Regen/ Rhyne/ Riagan: It means “Little king”
- Regin: Rule
- Reginald
- Reidhachadh
- Reilley: Form of Ryley
- Reilly: Descendant of a king
- Renny: Small but powerful
- Revelin
- Reynald
- Reynolds
- Rhory
- Rhys
- Riagain: Furious
- Riaghail
- Rian
- Ricard/ Richardd: Powerful leader
- Richard
- Riddoc
- Rigbardann/ Rioghbhardan: Royal poet
- Rigr: King
- Riley: Valiant
- Riobart: It means “Bright fame”
- Riobárd: Royal bard
- Riocaird: Powerful ruler
- Rioghan: Great queen
- Rion: Kingly
- Riordain: It means “Bright”
- Riordan
- Risteaird: Strong power
- Risteard
- Roan
- Roane
- Roark/ Roarke: Illustrious and mighty
- Robartach: Impetuous
- Robert
- Robin (Bright, Fame)
- Rocatos/ Rocats/Rocatti/Rocatus/Rochadh: Battle
- Rodan: Fertility
- Roderick: Glory
- Rodger: Famous spearman
- Rodhlann: Famous land
- Rogan
- Roger: Famous with the spear
- Rohan: Red
- Roi
- Roibart: Bright fame
- Roibeard: Robin
- Roibhilin
- Roibin
- Roland: Renowned land
- Ron: Ruler’s counselor
- Ronain/ Ronan/ Ronit: Little seal
- Ronat: It means “Seal”
- Rooghan/ Rooney/ Ruadan/ Ruadhagan: Red-haired
- Roone
- Rorey
- Rorik
- Rorke: Famous ruler
- Rorric
- Rorry
- Rory
- Roslea: Grey woods
- Ross
- Rossin: It means “Little woods”
- Rourke
- Rourke
- Rowan
- Rowen
- Rowland: Famous land
- Rowney
- Rownun
- Rowyn
- Roy
- Royer
- Ruadhan: King
- Ruaidhri: Divinity
- Ruaidhrigh: Fame ruler
- Ruaidre/ Ruairi: King
- Ruairc:L Famous king
- Ruairí
- Ruanaidh
- Russell
- Ruy
- Ryan
- Ryan
- Ryley: Valiant
- Ránall
- Rí
- Ríonach
- Ríordán
- Rónán
- Rós
- Rúadhán
- Saebhreathach: Noble Judge
- Sagranas: Ruler
- Saichairí
- Saliciduni: Willow Town
- Sam’
- Sameer: Ewind Breeze
- Samueil: It means “God Heard”
- Samuel
- Sanctan: A Saint
- Saoirbhreathach
- Saoirse: Freedom
- Saorbhreathach: Noble Of Judgement
- Scandlain: It means “Quarrel”
- Scanlan
- Scanlen
- Scanlon
- Sciath: Bloodred
- Scoithin: Blossom
- Scolaidh: Scholar
- Scolaighe: Herald
- Scot
- Scott
- Scully
- Seabhac
- Seachnall: Second
- Seadna: Traveller
- Seafra: Peace From God
- Seaghan: A Hawk
- Seaghda: It means “Majestic
- Sealbéath
- Seamus
- Seamus: James
- Sean
- Sean-Carlo
- Sean-Mark
- Sean-Patrick
- Seanach/ Seanan: Old
- Seanachan: Wise One
- Searbhreathach: Judicious
- Searc: It means blackbird
- Searlas: Manly
- Seathrun
- Sebastian
- Sechnassach
- Senan
- Seoirse
- Seosamh
- Setanta
- Seumas
- Seumus
- Seán
- Seónas
- Shamus
- Shanahan
- Shanahan: Wise
- Shane
- Shanley
- Shannley
- Shannon: It means “River in Ireland”
- Shaughan: God is gracious
- Shaughn
- Shaun
- Shane
- Shaundre
- Shawn
- Shawnel
- Shawnell
- Shawnn
- Shay: Stately
- Shayn
- Shea
- Sheehan: Peaceful
- Sheredan
- Sheridan: Wild one
- Shonn
- Simon
- Sionnach
- Siúirtán
- Skelly: Storyteller
- Slavin
- Slawin
- Sleven
- Slevin: Mountain climber
- Sloan: Warrior
- Sluáin
- Somerled
- Somerley
- Somhairle
- Sorley
- Spealáin
- Stephen
- Steven
- Stiofan: Stephen
- Strachan
- Strahan
- Struther
- Struthers
- Stíobhard
- Sullivan: Blackeyed one
- Sweeney: Little hero
- Sweeny
- Szymon
- Séa
- Séamus James
- Séanmhar
- Séasán
- Séat
- Síle
- Síomón
- Taber: Well
- Tabor
- Tadc
- Tadg/Tadgh: Poet
- Tadhg
- Tadleigh
- Taggart
- Taicligh: Peaceful
- Tait
- Tanaide: Subtle
- Tavis
- Tavish
- Teague
- Teague: Poet
- Tearnan/ Tiarnach/ Tiarnan: Lord
- Teger
- Teigan
- Teige
- Teigen
- Terrence: Tender
- Tevis
- Thiarnáin
- Thomas
- Thurl
- Thurle
- Tiarnan
- Tiarney
- Tiarnán
- Tibbot
- Tienan
- Tighe
- Toirdhealbhach
- Tom
- Tomaltach
- Tomas
- Tommy
- Tomás: Twin
- Torence
- Torin: Chief
- Tormaigh: Thunder spirit
- Torrance
- Torrence
- Torrens
- Torrin
- Tracy/ Treacy: Fighter
- Traolach: Abettor
- Trasnáil
- Treabhair
- Tristan
- Troighthach
- Trostán
- Troy
- Troye
- Tuathal
- Tuile
- Tulley
- Tullie
- Tullis
- Turlach: Assits
- Tyler
- Tynan
- Tynell
- Tynen
- Tynin
- Tynnen
- Tynnin
- Tynon
- Tyrone
- Táilliúr
- Tárlach
- Téodóir
- Uaid
- Uailteir: Ruler of the people
- Uaine: Well born
- Uaithne: Green
- Uallach/ Uallachan: It means “Proud
- Ualtar: Strong fighter
- Ualteir: Army ruler
- Uar: The cruel
- Ughaire
- Uileac
- Uileag :
- Uileog
- Uileos
- Uilis
- Uilliam
- Uinsean
- Uinseann: Victorious
- Uisteann: Intelligent
- Ulick
- Ulster: Wolf
- Ultan
- Ungus: One vigor
- Unkoo: Fierce hound
- Uri
- Usheen: Little deer
- Ward: Bard
- Whealan: It means “Joyful”
- William
- Zach
- Zorán