400+ Irish Last Names (With Meanings and Popularity)

Riley is the spelling of this lively Irish name most often picked for girls, but this version is occasionally used.

Keeley is well-used in modern Ireland, also found as Keely and Keela. The boys' form is Keelan. Largely unknown in the US, this could make an interesting update for Kelly or Kaylie or Kylie. A famous bearer is actress Keeley Hawes.

A winning last-name-first Celtic choice, Flynn is still mostly used for boys, such as the son of Orlando Bloom and Miranda Kerr. Though Flynn is definitely one of the Irish surname names, from Quinn to Flannery to Makenna, that makes one of the trendy boy names for girls".

Kenny might be all South Park to some, but it has been in steady use in the US since the 1930s.

A spelling variant of presidential surname Regan that briefly entered the Top 1000 for boys in the 1960s, but hasn't rejoined the list since. Shakespeare also used the name for a daughter of King Lear, inspired by an ancient king of the Britons in accounts of the medieval scribe Geoffrey of Monmouth.

This friendly Irish surname is catching on with girls, perhaps due to the easy Callie nickname.

Tully is an Irish surname just waiting to be adapted as a first. Cute and lively, and reminiscent of Tilly or Tali, it's got a long history and a range of possible meanings, depending on which root you use.

Long before the vogue of using Irish surnames for girls, writer Flannery O'Connor gave this one some visibility. It has a warm (flannelly) feel and the currently popular three-syllable ee-ending sound.

Presidential name that makes a fresh substitute for MacKenzie or McKenna. Possible spelling variations include MacKinley, MacKinlee, Makinleigh ad almost infinitum. McKinley is one of the Scottish names for girls that can work equally well for boys.

Spunky Irish surname that still has a pugnacious feel from its lingering association with one of boxing's greatest champs, Jack Dempsey. Many people may associate it more with Patrick Dempsey these days—McDreamy from TV's Grey's Anatomy.

Simple, usable surname choice.

A name that has many close, more familiar relatives, like Mira and Myra.

Irish surnames are hot, and this one can successfully cross the line to work for girls, replacing the outdated Casey. And only a dozen girls were named Clancy in the US in one recent year (along with 27 boys), making it one of those rare Irish names that are both accessible and distinctive, classic and cool. Clancy is a winner for either gender.

Conroy is one Con name that feels a bit dated, though perhaps it's so far out it's coming in? Worth consideration if you like Connor but feel it's too widely used.

She's the bff of Blair, Blake, and Brooke who shop at Bergdorf's, Bonwits and Bendel's.

A jovial and jaunty Irish name, the title of a long-gone TV crime drama, this would make an appealing choice. Slight downside: Maddy is already a mega-popular nickname for Madeline/Madelyn and Madison, so this Mad- name might not feel as distinctive as the stats would suggest.

Immigrated into American pop culture in the person of 1940s superstar Tyrone Power, Jr. It has been on a steady decline since the 1970s.

This more elaborate but not unfamiliar spelling of Riley feels oddly more feminine. Designer and Beatle daughter Stella McCartney has a daughter named Reilley. Still, Reilly or more common Riley is one name that's remained popular for both boys and girls.

Gallagher is, like so many of its genre, friendly, open, and optimistic. Some might associate it with the fraternal members of the band Oasis, Noel and Liam Gallagher.

An unusual, energetic surname choice that would make a good Madison alternative. Madigan was a typical police detective series of the 1970s, starring Richard Widmark.