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.

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.

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.

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.

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.

A hugely popular choice for boys in England and Wales, Finley has been used for both sexes in the US since the early 2000s, and has since become one of the most popular unisex names. Until recently, it was tilting slightly towards the girl side, however, as of 2024, it leans more masculine.

Killian – aka Cillian – is a spirited yet resonant Gaelic name that was borne by several Irish saints and could make a distinctive replacement for the dated Kelly. Kylian is another spelling that's gaining traction, thanks to French soccer star Kylian Mbappé. Possible downsides: an unsavory first syllable and a connection to the trendy brew.

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.

One of those simple, straightforward English surnames -- and with a presidential pedigree -- that's easy to translate into a first. Chosen by both Kevin Costner and Jessica Alba for their sons, it has been climbing the US charts since 2009.

Hot young actor Alden Ehrenreich, the new Han Solo, gives this formerly-stodgy surname name an attractive new image, making it a fresh successor to Aiden or Holden. Before it got this fresh shine, Alden was among the classic Thanksgiving baby names.

The poetic, soft-spoken Auden has recently started to be considered as a first name option, used for both sexes, appreciated for its pleasing sound as well as its link to the distinguished modern Anglo-American poet W.H. Auden.

Eamon is one of the traditional Irish names that has not yet emigrated to the US. This Irish name pronounced ay-mon was popularized by early president of the independent republic Eamon de Valera (birth name George), who was born in the United States to an Irish mother and a Cuban father. Eamon definitely has possibilities as a successor to the epidemically popular Aidan/Aiden.

A cool, rugged sounding name, Calder is connected to an ancient Scottish clan, an English village, and a Scottish River, along with the sculptor Alexander Calder, who invented the mobile (as in, kinetic sculptures powered by motors or air). Meaning "rocky water" or "stony river" in the ancient Brittonic language, it makes a creative yet outdoorsy choice.

Finnian is a fair jig of a name, energetic and easy on the ear. Finnian (and brother Finian) is also familiar in its alternate spelling through the classic 1968 Broadway musical Finian's Rainbow, later made into a film starring Fred Astaire as Finian McLonergan.

Garrett, also spelled with one 't', is an Irish-inflected name that was in the Top 100 in the nineties, but has now slipped in popularity.

Parents who have tired of Sean are now contemplating Seamus, the Irish form of James, which has a lot more substance and verve.

Cullen is an appealing Irish surname name that upped its cool factor considerably when it became the Twilight family name of Edward et al. It's considerably less popular than it was at its peak in 2010, but is still widely used.

The seventh most common surname in Scotland, once associated only with soup, is now being considered as a last-name-first choice, accessible but unusual.

Kellen is German in origin and Irish in spirit. Kellen has fallen a bit in popularity for boys since its peak in 2012, but it has possibilities for girls too. In fact, Kellen's similarity to such feminine names as Helen, Ellen, and Kelly makes it feel more unisex or even female, though Twilight actor Kellan Lutz has done much to popularize this name for boys.

While Kieran is the class and most-used male form of this name, some people spell it Keiran in keeping with the female Keira, the version popularized by the gorgeous Ms. Knightley.