Zoe is one of those surprising names that has been on the Top 1000 nearly every year since 1880, but it's only since the turn of this century that it's ranked in the Top 100.

Eva is a simple, classic Hebrew name for girls that recently slipped out of the US Top 100 for the first time in more than a decade. Pronounced either like her more popular sister Ava or less popular sister Eve, Eva is one of the elite group of girl names that mean life.

Jennifer is the Cornish variation of Guinevere, which ultimately derived from the Welsh name Gwenhwyfar. As such, it is connected to the queen of Arthurian legend, and sharees the same meaning of "white shadow", "white wave", or "white phantom".

Through all the years when Betty, Betsy, Beth, Liz, and Lizzie were the Elizabethan nicknames of choice, the bubblier Libby was set aside, but today it may be the most modern of all—it has already made a strong comeback in England and Wales, where it ranks Number 139.