Nova might be a much more commonly used a girls' name, but enough parents saw unisex appeal in it for it to debut on the US Top 1000 for boys in 2017. Nova is an astronomical term for a star that suddenly increases in brightness, then fades.

As a boys' name, Angel has two distinct name personalities. One is as a perennial favorite Hispanic boys’ name, popular in the US along with Spain, Mexico, and South America.

A sweet and sophisticated nickname which feels fresh again after many years in style limbo. For literature lovers, it brings to mind Theodore "Laurie" Laurence from Louisa May Alcott's Little Women. Another famous bearer is English actor Hugh Laurie.

Harper got its start as a celebrity baby name when Paul Simon chose it for his now-grown son. Since then, other famous parents have followed suit: musician Tim Finn and actor Cecilia Peck both have sons called Harper.

The Sydney spelling most popular for girls: it's in the Top 50 on the female side. Cool for a girl, still nerdy for a guy.

Kyrie may be a name of God used widely in the ancient church refrain Kyrie Elieson, or Lord, have mercy, but it's rising in popularity for boys in the US on the strength of basketball star Kyrie Irving. Irving pronounces the first syllable of Kyrie to rhyme with my, whereas with the religious word it rhymes with fear.

More popular in its Layton spelling, Leighton is rising in popularity in the US for both sexes simultaneously, although this spelling remains more popular for girls for now – no doubt helped by actress Leighton Meester. Lleyton – as in Australian tennis star Lleyton Hewitt – is another, even more complicated, variant spelling.

Teagan is a cousin of trendy names Reagan and Keagan now given to girls about six times as often as boys. As an Irish name, it's a diminutive of the original Tadhg. Teagan may also be a variation of the Welsh Tegan, a saint's name that means fair.

Among the coolest of the cool color names, particularly popular with celebs as a unisex middle name. While most famous as the name of Beyonce and Jay-Z's daughter Blue Ivy, more than 60 percent of the babies named Blue are boys.

A glamorous surname name most famously borne by 1930s icon Jean Harlow (born Harlean Carpenter), Harlow is also the name of a town in the English county of Essex. Outside of the UK, Harlow would fit right in with contemporaries Arlo and Marlow(e).

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 nouveau name of Keanu Reeves's character in The Matrix has not enjoyed the same burst of popularity as its female counterpart, Trinity, but it definitely sounds, well, newer. Neo Rauch is an interesting contemporary German artist.

Palmer is a name that derives from the fact that pilgrims often carried palms, thus the double meaning. It's a fresher sounding twist other surname style names, such as Spencer, Carter, Porter and Parker.

Before there was Aspen, Denver was the Colorado city name of choice, and it reentered the US Top 1000 in 2015 after a 14 year absence as a stylish two-syllable boys’ name with its trendy -er ending. Its decade of greatest use was the 1920s, when it reached as high as Number 422.

Bentley, a somewhat stuffy British surname, previously associated primarily with an incredibly expensive English car, has had a recent surge in popularity, thanks largely to the reality TV shows 16 and Pregnant and Teen Mom, with Bentley being the name of the son of breakout star Maci (another new favorite) Bookout.

While Marlowe (and Marlow and Marlo) are surname names that are not intrinsically or traditionally gendered and so in theory work equally well for boys and girls. About 10 percent of the babies named Marlowe are boys, while Marlow is 25 percent male and Marlo is about 50-50.

Not to be confused with shea butter, this name is a common surname in Ireland, combining spirit, substance, and gentleness. The traditional Irish form is Séaghdha (SHEH), though it could also be used as a short form of Séamus, connecting it to James.

Updates Ellis -- but also has a lot of feminine potential thanks to Allison/Ellie similarity.

Popular Arabic name for boys and sometimes girls too, that's also a term of authority in India.

Kingsley is a sophisticated Harry Potter name that entered the US Top 1000 in 2013.