400+ Irish Last Names (With Meanings and Popularity)

Callahan, the simpler spelling of Callaghan, is a rhythmic jig of a name whose history harks back to the ancient King of Munster. In the Dirty Harry movies, the Clint Eastwood character is Harry Callahan.

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.

Bellamy is a surname name with an admirable meaning and upbeat rhythm, similar to jovial choices like Rafferty, Barnaby and Willoughby.

Though it has a Scandinavian ring (a la Thorfinn), Torin is in fact a multicultural choice, an occasional feature in the UK Top 1000, and given to around 150 boys in the US each year. Connected to nature, power, and astrology, it is a distinctive yet trendy sounding choice.

Mara is the evocative ancient root of Mary, appearing in the Book of Ruth, in which Naomi, devastated after the death of her two sons, says "Call me not Naomi, call me Mara." It's one of the girl names starting with M that both fits in and stands out.

If you like the Finn names and love James Joyce, Finnegan is extremely winning. Will & Grace 's Eric McCormack chose the Finnigan spelling for his son. And of course Finnegan gains you access to the great short form Finn.

Collins is a surname name that has made the girls' Top 1000 thanks to its use for the daughter of the real-life Blind Side heroine. As of 2019, Collins climbed into the US Top 500. This derivation of the Greek Nicholas—which means "people of victory"—or the Irish and Scottish Colin—which may itself be a Nicholas derivation or an Anglicization of the word for pup—has a stylish feel made more so by that final s.

Delicate ballerina name with grace, charm, and heft courtesy of Jane Austen's Mr.

An Irish surname-name that's used almost exclusively for girls these days, given last year to nearly 2000 baby girls in the US vs. 23 baby boys.

As Meghan/Megan and Reagan/Regan show signs of wilting, along comes Teagan to take up the slack: definitely one to consider. The vast majority of American babies named Teagan are now girls. A variant spelling is Teaghan.

Riley -- one of the most popular unisex names -- is trendier now for girls though for boys it's a classic, ALWAYS ranking in the US Top 1000.

The energetic Brody is a name that claims different meanings and origins depending on whether you're looking at its Irish, Scottish, or English history -- and Eastern Europeans claim a version too. An alternate spelling is Brodie.

Connor, the appealing name of an early semi-legendary king of Ulster in Irish mythology, sits firmly in the Top 100 and taken together with its alternate spellings would rank even higher. In its native Ireland the Conor version is one of the highest charting boys’ name.

A growing number of high-profile (and other) parents are choosing to honor their musical idols, such as Hendrix, Presley, Jagger, and now Lennon, an Irish name for girls as well as boys with a wonderful meaning on many levels. Lennon first came to notice when Liam Gallagher and Patsy Kensit used it for their son in 1999, and singer-musician Adam Pascal followed their lead two years later.

Delaney has been a popular surname-style choice since 90s, when it joined other Irish surnames such as Cassidy, Kennedy, and Mallory on the US Charts. Buoyant, bright, and cheerful, it ranks in the US Top 250 and is given to nearly 1300 babies every year.

Stylish, gentle, and rustic at the same time, Rowan is a name that falls into various categories. Unisex and cool, mystical and woodsy, with the feel of both Rose and Riley, Rowan is a fresh but familiar choice.

This was a 100 percent boys’ name until celebs Jason Sehorn and Angie Harmon bestowed it on their daughter, followed by Lisa Marie Presley, who used it for one of her (female) twins. Finlay is also now among the most popular unisex names.

Fallon is one of several boyish surname names introduced in the over-the-top 1980s nighttime soap Dynasty. Despite being a "mom" name, Fallon is making a surprise comeback. It returned to the US Top 1000 in 2019 and has been rising since then, as a new generation of parents fall in love with the sound. It is especially popular in the Southern states.

Following in the footsteps of popular brother Brady, Grady is another lively, ebullient Irish surname name. The O'Gradys (originally O Gradaugh) were an ancient clan that produced an impressive number of bishops.

Perhaps the most remarkable O'Grady descendant is Muhammad Ali, whose mother's maiden name was Grady.

Kellan Lutz is the attractive young actor who plays Emmett Cullen in the Twilight series.