The two X's may be a challenge for even the most intrepid baby namer. Xerxes was the name of two early kings of Persia and the Handel opera Serse or Xerxes is loosely based on Xerxes I.

A somewhat solemn appellation, Anselm is a saint's name, connected to the twelfth century archbishop of Canterbury, and in modern times tied to the German neo-expressionist painter Anselm Kiefer.

This name of a third-century Christian martyr has an romantic, appealing feel in the modern world. It first came to American attention via Prince's love interest in the film Purple Rain. It could make an unexpected route to sweet nickname Polly — or perhaps to the quirky apple!

These days, it's thought of less as the name of the great general and more as the first name of Lecter the fictional cannibal. Either association is too heavy for a child to bear.

Archimedes of Syracuse was a famous Ancient Greek thinker, especially in the fields of mathematics and sciences. He made important contributions to geometry and calculus. His name was a perfect choice, meaning "master planner" or "master thinker".

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.

Super-sweet name that was the title of a Broadway play -- but best known as a type of apple. The Dutch variation is Pepijn is finding some popularity in that country, where short nickname names are stylish.

This Scandinavian name was made famous in English-speaking countries as the name of the dog in the "Thin Man" series. Danish actress Asta Nielsen was another famous bearer. Asta can be considered as a short form of Astrid or Augusta.

An aromatic, unconventional name.

This Cornish place name comes from the name of a Breton saint who came to Cornwall. It could be an interesting alternative to Austin. The spelling has also been recorded as Austol.

Dignified first name of poet W. H. Auden, less exposed than his currently stylish surname.

The name of the great Homeric hero with the vulnerable heel, Achilles is more popular in its international form, Achille, which is popular in France, Italy, and Belgium. This variation did however appear briefly on the US Top 1000 list in 2015, perhaps owing to its similarity to the likes of Atticus, Adonis, and Apollo. It has declined in use since then, but is nevertheless chosen for around 160 babies each year.

Drusilla is an ancient Roman name, (probably) borne by descendants of Antony and Cleopatra, and is one of the 'illa' names that are ready for a comeback, especially with its cute short form Dru.

Reference to the mythological Three Graces of womanly charm, this one representing charity. Pronounced in Greek as starting with a back-of-the-throat H sound, most English-speakers would translate that to something closer to KAR-is. It's also the name of a girl who lived in Atlantis in the novel Taliesin, and appears in the Margaret Atwood novel The Robber Bride.

Despite the reputation of the sagacious ancient Greek lawmaker, this name hasn't moved to the modern world.

Brutus is the quintessential brute--far too close to the word brutal. And any child with this name would spend much of his life hearing "Et tu."

Seneca's distinguished heritage as the name of the ancient Roman philosopher-playwright who tutored Nero, and of an Iroquois tribe makes this an interesting choice for either sex.

Alethea, the name of the Greek goddess of truth, came into fashion in England in the 16th century, in tandem with the virtue names. Alethea may find new favor now, thanks to its similarity to Athena, Ophelia, and Alessia, and because it gets you nickname Thea.

This Slavic classic name might begin to make its mark with American parents, what with the growing popularity of the short form Mila. Borne by a tenth century saint who had been a princess from Bohemia, Ludmila is widely used in Russia, Ukraine and Bulgaria.

Popular with the Puritans, this name of the shrewd and beautiful wife of King David and mother of King Solomon could be a bit of a load for a modern girl to carry.