The name of the Roman goddess of the moon, Luna is derived straight from the Latin word for moon, luna. Luna may be the name most likely to surprise someone from an older generation by its Top 10 status in the US and its widespread international popularity.

Philippa is a prime example of a boy's name adapted for girls that was common as crumpets in Cornwall, but rarely heard stateside. That was before the advent of royal sister-in-law Philippa Middleton, who goes by the lively nickname Pippa.

Long a popular upper-crust form in England, where it's pronounced George-ee-AH-na, Georgiana has been been neglected here. But with Georgia growing more popular and the general fashion for elaborate feminine names, Georgiana might have room to grow.