Cassiopeia, the name of a mythological mother who became a stellar constellation, is challenging but intriguing, and has all those softening Cass nicknames available. And with all names Cass-related trending, Cassiopeia may be an unusual route to a stylish name.

In Greek mythology, Amalthea is the name of a goat (or, sometimes, a goat-keeping nymph) who nursed the infant Zeus and protected him from his murderous father, Cronus. Thanks to the goat’s protection and nourishment, Zeus grew up to overthrow Cronus.

Eris was the goddess of strife and discord, turned fairy tale and then popular culture figure Maleficent in Sleeping Beauty. Ironic, as her name sounds so much like that of Eros, the god of love.

J.K. Rowling is a modern master of naming who brought a whole constellation of ancient and celestial names to modern parents. Bellatrix, of one of the stars of Orion, combines fashionable names Bella and Beatrix to make a convivial and original name. The down side: the Harry Potter character Bellatrix, played by Helena Bonham Carter, is a character so evil she's called a Death Eater, killing one beloved character and being murdered by another. And the name Bellatrix is so closely associated with that character that it might be challenging to sidestep the association.

If you love both unique baby names and flower names for girls, Amaryllis might be a perfect choice for you.

Asteria is an Anglicized spelling of the Greek Astraea or Astraia, the goddess of justice and innocence. She became the constellation Virgo, so all forms of this name would be especially appropriate for a child born in late August or early September.

Said to refer to either Jupiter or Venus, either of which would be preferable as a name.

Kairi is the name of the main female character in the popular role-playing video game series, Kingdom Hearts. Voiced by Hayden Panettiere in the main series, Kairi is one of the seven Princesses of the Heart. Kairi entered the US Top 1000 in 2010 and was given to over 400 baby girls in one recent year.

Nevaeh: an already bold word name with the unusual twist of being spelled backwards; a nightmare for those who love traditional, classic names; a divisive option on name forums across the internet; and a spelling and pronunciation that aren’t quite intuitive at first glance.

Corisande is a very unusual, haunting choice, with the aura of medieval romance--it is found in early Spanish romantic tales, arriving in the English-speaking world in the nineteenth century.

Seen as both a given name and a surname in Japan. There was a Princess Izumi in eighth-century Japan, forbidden from marriage as her older sisters had already been paired off with the Emperor's sons.

Lovely Japanese name that would certainly be appreciated in Europe and the U.S. It was rarely used in Japan until the 1990s, and draws its current popularity from the fact that it is deeply connected to Japanese traditional culture without sounding frumpy and old-fashioned.

Zvezda, which means star in several Slavic languages, is a traditional established name in Eastern Europe and Russia. While names with celestial meanings have an intrinsic appeal, that initial Zv may be difficult for English speakers to wrap their tongues around.

One of the most familiar and attractive Japanese names, though rarely heard outside that culture.

Altalune is an invention used by Uma Thurman and Arpad Busson as one of several middle names for their daughter. It's evocative Latin meaning roughly translates to "over the moon." Celebrity baby Altalune will be called the more familiar Luna for short.

An evocative ancient word that's used as a first name in the New Testament, among other places. It's also the name of an eagle-shaped constellation.

Cadenza takes the popular CADENCE and gives it a more operatic flourish.

There are many in Japan, but for most Americans there's only one Yoko.

This French word for star sounds like even more of a celebrity-worthy choice than Star or Esther or Estella or Stella. But count on English speakers who never took high school French to stumble over the pronunciation.