400+ Irish Last Names (With Meanings and Popularity)

A common surname in Ireland that projects a complex image for a short-one-syllable name, combining spirit and substance.

One of the original unisex Irish surname names, energetic Casey bounced onto the scene in the 1960s, then peaked in the 1980s for both boys and girls. Today Casey is having a resurgence for both girls and boys and re-entered the charts on the girls' side, likely due to the character Kayce Dutton (pronounced like Casey) on the hit show Yellowstone.

Irish place-name -- it's a river, a town, and an airport -- once popular but now supplanted by such newer immigrants as Saoirse and Seanan.

A strong, straightforward Irish unisex surname, with a merry glint in its eye, Reagan has been leaping up the popularity lists, to become one of the top girl names starting with R. Some will inevitably link it to President Ronald, but spell it Regan and it's a Shakespearean name: a daughter of King Lear.

Egan's likeness to the word eager gives this Irish surname a ready-to-please, effervescent energy, and it would make an appropriate substitute for the overused Aidan.

Mackenzie begat McKenna - a catchy but very trendy choice. While the Mc or Mac prefix means "son of," this is much more popular as a girl name in the US, peaking at #177 in 2002.

Cannon sits amongst other weapon names like Colt, Pistol, Lance, and Remington. Definitely a name that offers bombast.

Devilishly handsome, Devin arrived as Kevin was moving out. Not to be confused (though it often is) with the English place-name Devon. While both Devin and Devon are flagging somewhat for boys, the names have dropped out of the Top 1000 for girls, making it more a masculine and less a unisex name these days.

Murray, you may be surprised to discover, is a Scottish surname name --that of an ancient noble clan--with a sea-swept meaning, and just could be in the next wave of reevaluated grandpa names. Currently Number 60 for baby boys born in its native Scotland; it was at its highest in the US in 1922, when it reached Number 208, but has been off the list since 1975. Could it be time for a comeback?

The mythological Morrigan was the ancient goddess of war, often symbolized by a crow. Besides being a name, this is also used as a proper noun preceded by an article: the Morrigan, defined as a monster in female form. The meaning of Morrigan has been related to both terror and greatness. While some relate the name to Morgan of the Arthurian legends, Morrigan and Morgan are actually unrelated.

Properly spelled with a fada in Gaelic (Faolán), this name is the origin of the Irish surname Phelan. It derives from the Gaelic fáel "wolf", plus a diminutive suffix, making this a handsome hidden nature name.

While Larkin takes this name from girlish bird to boyish surname, there are actually more female Larkins these days than male, and it's a name that works as well for either gender.

Madden is an Irish surname relative of Madigan rising through the charts thanks to its trendy two-syllable, -en ending sound along with its appeal to Madden Football video game-playing dads. John Madden is a former pro football player who went on to coach the Oakland Raiders and become a popular NFL commentator. Madden is also the surname of groovy Nicole Richie baby daddy Joel Madden.

Clancy, one of the original crossover Irish surname names, is as energetic and appealing as ever — full of moxie, more distinctive than Casey, and also one of the less obvious of the red-headed names.

The name of the longest river in the British Isles rose to the US Top 25 for girls in the 1970s and the Top 100 for boys, but has fallen off the Top 1000 for both genders. At the latest count, the name Shannon was given to about 200 babies in the US, about a third of those boys. As a favorite Irish name, Shannon has now been supplanted by newcomers such as Saoirse and Seanan.

Channing is a sophisticated surname name whose use is probably linked to actor Channing Tatum and Channing Crowder, former linebacker for the Miami Dolphins.

This ultrapopular boys' name is rapidly becoming a hot name for girls; admired for its buoyant Irish spirit.

An appealing Irish placename with a unisex feel, Ennis would be a fresh alternative to Dennis and Ellis. It's little-used for boys and even rarer for girls, but since Kirsten Dunst and Jesse Plemons used it for their son, it could be one to watch.

This unisex name, the seventh most popular surname in Scotland, can make a more unusual Cameron alternative. It is represented on the girls' side by TV news correspondent Campbell Brown, for whom it was a family name, Brown was born Alma Dale Campbell, Alma Dale being her grandmother's name,and Campbell her mother's maiden name.

A few decades back, this name -- which hardly shows its Irish roots -- evoked a man in a gray flannel suit; now, though still upscale, it's more likely to be attached to a female.