Shawn is one name that's become less unisex and more distinctly male over time in all its spellings, given to only 14 baby girls and over 500 boys in the US in the most recent year counted. But at its peak in the early 1970s, it was a Top 200 baby name for girls in the US, given to nearly 2000 baby girls... and 12,000 boys in this spelling alone.

An Irish last-name-first-name that could make a child feel distinctive, while still having the regular guy nickname of Quinn. Christine Taylor and Ben Stiller spelled their son's name Quinlin.

While the lin ending is more commonly found in girls' names, Carlin is an authentic Irish male choice and was used just about evenly for both sexes in the US last year.

Curran is a curry-flavored Irish surname-y name that could work as well for girls as boys. Curran can be a fresher spin on the Twilight-inflected Cullen.

Rohan is an Indian (masculine) name derived from Sanskrit and meaning "ascension", however, it is one of those names with cross-cultural possibilities. It can also be a spelling variation of Rowan or Ruadhán and a variation of the Arabic name Ruhan.

A unisex name in the same vein as Casey, Cassidy, and Kelly, Carey and its alternative spelling Cary were familiar choices for boys in the first half of the 20th-century, and became popular in the 50s and 60s. By the 70s however, things had shifted: Carey was more popular for girls, reaching number #304 at its 1975 peak when it was given to nearly 760 girls.

A lively boys' name that works well for girls.

Rion is a masculine name with multiple possible origins. It may be derived from the Irish name Ryan, meaning 'little king,' or from the Greek word meaning 'flowing.' Some consider it a variation of Orion, the legendary hunter from Greek mythology. In Japanese contexts, Rion can be written with characters meaning 'jasmine' and 'sound' or other combinations. This multicultural name has gained modest popularity in recent decades across several countries, appealing to parents seeking short, strong-sounding names with international appeal. The name's brevity gives it a modern feel, while its various cultural connections provide depth and versatility. Rion projects an image of strength and individuality with a cosmopolitan flair.

The double 'e' gives this Celtic surname a genial sound. It derives from an old Irish name — Suibhne (SHEEV-ne) that was borne by several early saints and kings, including, unfortunately, one known as Mad Sweeney who spent his life living in trees and composing nature poetry. Another possible drawback is the association with Sweeney Todd, the bloodthirsty butcher of Sondheim stage-musical fame.

While Keegan has been rising in popularity for a number of years, this variant spelling has dropped in the lists.

This Irish surname packs a lot of attitude, projecting an image of spunk and sass. The Welsh singer Duffy, born Aimee Anne Duffy, is best known for her songs Mercy and Warwick Avenue.

Magee became one of the first gender-bending Irish surname names so popular today thanks to New York television newswoman Magee Hickey. In case you don't know, the g is hard, as in Maggie, but with the opposite emphasis.

Keelan is the Anglicized, phonetic form of the more traditionally-spelled Caelan.. While this name is said by many sources to be unisex and might certainly feel unisex to Americans, in practice in modern Ireland it is only given to boys. Keelin is also found.

Somewhat gruff name that might be better feminized as Duffy.

A name scattered throughout Irish mythology with an intriguing sound, Carbry is one of the rare Irish names for boys virtually unknown in the US. Bry is the obvious, but lovely nickname option.

With Galway and Ireland in play as names (not to mention Shannon and Kerry), there's no reason this one can't work, too.

Farrell is usually considered a boy's name, though the soft sound of this Irish surname makes it perfectly appropriate for a girl, reminiscent of Farrah.

Makes Donna into a cool twenty-first-century unisex Irish surname.

The name of a river and several places in Northern Ireland, Clady comes from the Irish cladaigh meaning "rocky shore; muddy river banks." Also used as a surname, it feels reminiscent of Brady, Grady, and Clay.