Isla is a hit name throughout the English-speaking world but hasn't found the same popularity in other western countries, perhaps because its spelling and pronunciation don't make sense for those whose native language is not English. Think island without the final two letters.

Sadie started as a nickname for Sarah, but their images couldn't be more disparate. Where Sarah is serious and sweet, Sadie is full of sass and fun.

Arabella, lovely and elegant, has long been well used in Britain and finally made it onto the American list in 2005. A Top 50 choice in the UK, in the US in remains in the Top 300, given to around 1300 babies each year.

The temperature is definitely rising for this popular seasonal name, which began being used in the seventies, and has been heard consistently ever since.

Jean Harlow (born Harlean Carpenter), the original platinum blonde bombshell, was a symbol of 1930s glamour, a factor that first Patricia Arquette and then Nicole Richie and Joel Madden probably had in mind when they gave their daughters the distinctive surname name Harlow.

Arlo, an unexpectedly popular name for boys these days, is also finding new life as a girls' name. Its roots are primarily as an Irish or English surname, but it might also be a short form of the Spanish Carlos or Italian Carlo, forms of Charles.

Reggae master Bob's surname was one of the biggest risers on the popularity charts for girls in 2008, with spellings Marlee and Marely also leaping in favor. Also used for boys, Marley is one of the top unisex names in the US.

One of those names that's suddenly on the map because of a celebrity's influence, Leighton Meester of the TV show Gossip Girl. She pronounces it LAY-ton but some will intuitively say LEE-ton.