Traditionally Masculine

Despite its origin as a patronymic meaning "son of Adam", Addison really caught on for baby girls in the US around the turn of the millennium, following in Madison's footsteps to peak at #11 in 2007 and again in 2010.

This name leapt into the female column via vixen Alexis Carrington on 'Dynasty" in the 1980s. It's more popular for girls, but it's still a widely used boys' names and is one of the most popular unisex names in the US today.

This shows up on the Social Security data for boys, but these days is mostly female: 2700 baby girls were named Allison last year versus six baby boys.

Carey is a surname name that works equally well on babies of all genders - Jazz great Carey Bell and motorcross champion Carey Hart are just two examples of how handsome this name can be for a boy.

While the variation Carmine is more familiar for boys, Carmen has also been used as a masculine name; consider the very macho Carmen Basilio — the American boxer famous for defeating the great Sugar Ray Robinson — or composer Carmen Dragon.

Spanish and Italian forms Carmelo and Carmello are also quite popular in the US, with Carmelo ranking in the Top 1000.

A lean and lanky Irish cowboy name with great nickname potential to boot (Cass or Sid are both options). This is one of the great under-rated American names!

Chelsea for a boy? Yes--and we've got two maleberry Chelseas to prove it (one of whom even wrote a blog for us about his experience)! Boy Chelseas would more likely be named for the British football team than the old Joni Mitchell song sung by Judy Collins.

Nowadays, Clare tends to be viewed as a feminine name, but this is a short and sweet Irish-flavored name that could work just as well on a boy. Noted male bearers of the name Clare include Canadian ice hockey legend Clare Drake, US cartoonist Clare Briggs, and Grammy winning musician Clare Fischer.

This courtly old Southern name has several cool male bearers: NFL player Courtney Brown, British jazz musician Courtney Pine, and Barbados-born economist Courtney Blackman, to name but a few.

Though Darcy is the ultimate Jane Austen hero name, it is rarely used for boys today though it's on the upswing for girls. A shame as it's a handsome, roguish kind of appellation that combines elements of French flair, aristocratic savoir faire, and a soft Irish brogue. And in terms of image, it's one of the quintessential English names for boys.

Renowned English author Evelyn Waugh pronounced his name "EEV-lin" (fun fact: his first wife, also named Evelyn, was referred to as "She-velyn"). But "EV-uh-lin" also works, and is probably the most familiar pronunciation of the name today.

Gale for boys is more a storm name than a short form of Abigail. Since Gale has resurfaced as the name of Liam Hemsworth's daring character in The Hunger Games, it has new force for boys.

Young actor Haley Joel Osment to the contrary, this name in all its variations has become too popular for girls to survive as a boys' choice. Hailey, Haily Halley, Hallie, Hayley.

The only version that works for boys anymore is the Latinate Hilario or Ilario. Better to look to Felix for a happy-meaning name.

In Paris, it's charming, but in America, it's still Jean, as in blue jean. Or Aunt Jean.

Quintessentially sweet and innocent unisex name of the 1960s and 70s, now gone the way of hot pants and disco balls.

Yes, the poet Joyce Kilmer ("Trees") was a man, the very last male named Joyce. And even for women, it's been in limbo for several generations.