Isis has gone from magical, feminist name on the rise to the forbidden list because of the extremist terror group called ISIS, an acronym for Islamic State of Iraq and Syria. Unsurprisingly, Isis was one of the fastest-falling names in 2014, dropping 130 ranks to reach #706. Interestingly, however, since 2020, it has begun to see increased use again, and 2023 saw it given to 151 girls.

A royal name in ancient Egypt that's never quite made it to the modern world, though nickname Cleo is widely used. Other now-extinct Cleopatra diminutives, including Cleora and Cleola, achieved some popularity in the early 20th century when there was a crazy for all things Egypt-related as the ancient tombs were opened and artifacts displayed. In the US, Cleopatra became a popular silent film in 1917 starring Theda Bara.

Hypatia, an ancient Greek name, has a distinguished namesake: Hypatia of Alexandria was an early philosopher and scholar of mathematics and astronomy. Fittingly, the name derives from the Greek hypatos meaning "highest, supreme", giving it a lofty and powerful feel.

With historical roots as a beautiful and intelligent ancient queen and literary ties to Hawthorne and Edith Wharton novels, this rarity could appeal to adventurous parents seeking the romantically unusual. Tina Fey used it as her daughter Alice's middle name.