Irish Names for Boys
Updated Wed Mar 18 2026
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Irish names for boys have achieved international popularity, ranking high on top boy name lists in the US and Ireland itself, as well as in many other Anglophone and European countries.
Liam, an Irish diminutive of William, is the brightest star among Irish boy names, ranking Number One in the US and among the top boys’ names in France, Belgium, Germany, Sweden, and Norway as well as Canada, Australia, and New Zealand.
Which Irish boy names are most popular in the US?
Along with top name Liam, other Irish boy names in the US Top 200 include Aiden, Ryan, Connor, Brayden, Declan, Brody, Rowan, and Finn.
What are the top Irish boy names in Ireland?
Irish names popular for baby boys in Ireland include Sean — now falling in popularity in the US — Rían, Oisín, Fionn, Cillian, and Tadhg. Classic Irish names Kevin and Patrick also still rank high on the US popularity list and remain perennial favorites in Ireland.
Browse our full menu of boy names of Irish origin here, ordered by their current popularity.
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- Kian
Origin:
Irish; PersianMeaning:
"ancient; king"Description:
A friendly Irish and Persian name chosen by Geena Davis for one of her twin boys, whose father is Iranian.
- Rowan
Origin:
Scottish and IrishMeaning:
"rowan tree; little redhead"Description:
With its gentle sounds and earthy vibes, the name Rowan feels like a fusion of different styles. A word name, a surname, and a gender-neutral name, Rowan is rustic but trendy, blending the vibes of both Owen and Oakley.
- Finn
Origin:
IrishMeaning:
"fair or white"Description:
Finn is a name with enormous energy and charm, that of the greatest hero of Irish mythology, Finn MacCool (aka Fionn mac Cuumhaill), an intrepid warrior with mystical supernatural powers, noted as well for his wisdom and generosity.
- Oscar
Origin:
English or IrishMeaning:
"God spear, or deer-lover or champion warrior"Description:
Oscar is one of the most stylish Old Man Names of our era. While it's softened slightly in popularity over the past 20 years, that may be considered a very good thing.
- Nolan
Origin:
IrishMeaning:
"champion"Description:
The friendly and sporty feeling Nolan blends some of the best qualities of other popular boy names. With the gentle but energetic sounds of Noah, a hint of the classic Nicholas, and the cool, surname-style vibe of Greyson or Colton, it makes for a familiar and grounded choice.
- Declan
Origin:
IrishMeaning:
"man of prayer"Description:
Declan is the Anglicized form of the Irish name Deaglán. St. Declan was one of the first missionaries to bring Christianity to Ireland, preceding St. Patrick. Originally from Wales, he founded the monastery of Ardmore in Ireland.
- Rory
Origin:
IrishMeaning:
"red king"Description:
This spirited Gaelic classic, which became popular in Ireland via the illustrious twelfth century king Rory O'Connor, makes a highly energetic choice, now used for either sex. Rory's gender split is still trending boyward; it's one of the coolest boys' names starting with R.
- Kieran
Origin:
IrishMeaning:
"little black-haired one"Description:
Long popular in Ireland and England, Kieran, the name of Ireland's first-born saint and twenty-five other saints, has been building its U.S. fan base thanks to its strong and attractive sound, and its fashionable Irish brogue. While Ciaran is the more authentic Irish spelling, Kieran is more popular this side of the Atlantic.
- Liam
Origin:
Irish short form of WilliamMeaning:
"resolute protection"Description:
Liam is the top boys' name in the US, holding the Number One spot for the past eight years and also ranking as one of the most popular boys' names around the western world.
- Ronan
Origin:
IrishMeaning:
"little seal"Description:
Ronan is the compelling legendary name of twelve Irish and Scottish saints that is now drawing some deserved attention; this cousin of the ascending Roman and Rowan was chosen by actor Daniel Day-Lewis and his writer-director wife Rebecca Miller in 1998, and more recently by actress Catherine Bell.
- Flynn
Origin:
IrishMeaning:
"descendant of the red-haired one"Description:
Flynn, a charming Irish surname, is still used only quietly, despite its easygoing, casual cowboy charm, unlike Finn which is a star of this genre. Flynn was the choice of Orlando Bloom and Miranda Kerr for their baby boy, and is also the middle name -- used as his first -- of a son of Miranda's fellow supermodel Elle Macpherson, of Gary Oldman's son Gulliver and Marley Shelton's daughter West.
- Casey
Origin:
IrishMeaning:
"brave in battle"Description:
Casey is a name with a big wide grin, Irish, friendly, and open, and associated with several American folk heroes--Casey Jones, the engine driver of the Cannonball Express who gave his life to save his passengers, and the legendary Casey at the Bat.
- Colin
Origin:
Diminutive of Nicholas or Irish and ScottishMeaning:
"people of victory; pup"Description:
Thanks to its dashing Anglo-Irish image — due partly to Colins Firth and Farrell — and its C-initialed two-syllable sound, Colin and its cousin Collin have enjoyed a long run of popularity, reaching as high as Number 84 in 2004.
- Cillian
Origin:
IrishMeaning:
"war strife or church"Description:
Cillian is one of the native Irish names that, along with Aiden and Declan, is becoming an unlikely favorite in contemporary America. The Killian spelling has been more popular in the US, but Cillian's star is rising, perhaps thanks to Irish actor Cillian Murphy, star of Oppenheimer and Peaky Blinders.
- Gus
Origin:
Diminutive of Augustus, Angus, Gustave, Augustin, Augusten, Augustine, AugustDescription:
Gus is a homey grandpa nickname name that can work as a short form for any of the above or stand on its own as a cutting-edge replacement for Max and Jake--though it was off the Top 1000 from 1978 until 2016, when it squeaked in at Number 999.
- Quinn
Origin:
IrishMeaning:
"descendant of Conn, chief leader, intelligence"Description:
Quinn is an engaging Celtic surname, zippy, concise and strong. While it may now lean feminine in the US, given to girls about 80% of the time, it is still given to a substantial number of boys: 615 in a recent count.
- Kevin
Origin:
IrishMeaning:
"handsome"Description:
Kevin came to the US with the large wave of Irish Immigrants after World War I, hitting the US Top 1000 list for the first time in 1921 and never leaving.
- Sullivan
Origin:
Irish surnameMeaning:
"black-eyed one"Description:
Sullivan is a jaunty Celtic three-syllable name, with a real twinkle in its eye. It was immortalized in the 1930s classic film Sullivan's Travels and was chosen for one of Patrick Dempsey's twin boys. Nickname Sully is equally jaunty.
- Alan
Origin:
IrishMeaning:
"handsome, cheerful"Description:
In its three most popular spellings -- Alan along with Allen and Allan -- this midcentury favorite has tended to skew older. It was a Top 100 name from 1938 to 1971, peaking at Number 40 in 1951. Alan has had leading roles on recent TV, in shows like Two and a Half Men, 24 and Boston Legal.
- Aiden
Origin:
IrishMeaning:
"little and fiery"Description:
Aiden in all its spelling variations is the Anglicized version of the Irish Aodhán, which was originally a pet form of the Irish name Aodh (pronounced 'ee'), who was the old Celtic god of the sun and fire. St. Aidan was a famous seventh century Irish saint, noted for his kindness and generosity and for spreading Christianity.
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