Dusty Ancient Gems

The name of the Muse of dancing in Greek mythology. Arguably the least usable of the nine Muses' names, despite serious competition from Melpomene and Polyhymnia. Those two at least have obvious nicknames, Mel and Polly -- and don't have "sick" in the middle. However, if you use the Greek pronunciation, that syllable is not emphasized, and you've got nicknames Tess, Coco, and Terri.

Although Thaddeus has long been used in this country, Thaddea is almost unknown and, with its air of mystery, could make a distinctive choice.

A pretty, rarely used Greek name, Thalassa is the ancient personification of the sea, particularly the Mediterranean, who is sometimes considered the mother of Aphrodite. In 1991, a newly discovered moon of Neptune was dubbed Thalassa.

A paramour of Alexander the Great and the heroine of a Massenet opera, this name is nothing if not dramatic.

Thelxinoë is the name of both a siren and a Muse in Greek mythology. Her name is derived from the Greek thelxis, "enchantment."

Themis was the Titan -- one of the Elder Gods (or in this case Goddesses) -- of Justice and Order, usually depicted blindfolded and holding the scales of justice. Themis was the mother of the Fates and the seasons. While her name has fallen from mortal use, Themis might rise again along with such rediscovered goddess names as Aurora and Juno.

This feminine form of Theodosius has long been buried deep in the attic, but might be a good discovery for the parent who wants to move beyond Theodora. Vice President Aaron Burr named a daughter Theodosia ("Dear Theodosia" is a song in the smash musical Hamilton), and it was the birth name of silent screen vamp Theda Bara. Theodosia actually appeared on the US popularity lists in the 1880s and 90s.