This Roman Emperor's name has long been considered too grand for an American boy. But in this era of children named Augustine and Atticus, it just may be prime for an unlikely comeback.

Casimir, a traditional name of Polish kings, could do quite well these days as we see the rise of Caspian, Cassius, Castiel, et. al. Like Leopold and Laszlo, Casimir is strong and worth considering if you've got an adventurous streak — and bet your son will too.

French-Canadian singer Dion made us notice this variation. Similar in sound but not related to the names Selene and Selena ("Moon"), sleek Celine has a more celestial, heavenly vibe.

Cosette is best known as the heroine of Les Miserables. In the Victor Hugo novel, Cosette was the nickname given to the girl named Euphrasie by her mother. Although Hugo invented the name, some etymologists believe it's a spin on Colette, originally a female short form of Nicolas.

Calla is a botanical name that is much more distinctive than popular Lily or similar Callie. Rarely heard today, it did appear in the popularity lists in the last decades of the nineteenth century.

Carmen has long been associated with the sensuous, tragic heroine of Bizet's opera, based on a novel by Prosper Merimee; more recently it has called to mind two other bombshells: Carmen Miranda (born Maria) and Carmen Electra (born Tara), as well as the great jazz singer Carmen McRae. In the celebrity baby name world, this classic Spanish name for girls was used by Hilaria and Alec Baldwin for their oldest daughter.

In Greek myth, Circe, daughter of Helios, the sun, was a sorceress living on the island of Aeaea, who could turn men into animals with her magic wand, which is just what she did to Odysseus's crew in Homer's Odyssey, transforming them into swine. All was forgiven, however, as Circe and Odysseus later had a child together—Telegonus.

Coralie is a French name not often heard here, though she's gaining some recognition via Neil Gaiman's similar sounding spooky and lovely children's book, Coraline. Other literary appearances: Coralie is the stage name of an actress in Balzac's Lost Illusions, and a French girl in an 1850 Thackeray novel.

Coralie is currently very popular in French-speaking Quebec, and there is a contemporary French singer named Coralie Clement.

Cato conjures up images of ancient Roman statesmen and southern antebellum retainers; it could have revival potential, with its 'O' ending and the current interest in the names of Greek and Roman antiquity.

This hyper-rhythmic name has two evocative references. In Greek mythology, she was an island nymph, a daughter of Atlas, who delayed Odysseus from returning home. It is also a genre of West Indian music, originating in Trinidad and Tobago and largely popularized in the States by Harry Belafonte.

Calista Flockhart spotlighted this lovely Greek name that has a long future in the English-speaking world. Kallista is another spelling; Calixta and Calixto are related.

Clio is the name of the ancient Greek mythological muse of history and heroic poetry, one that is rich with modern charm and would make an intriguing choice, especially thanks to its dynamic o-ending.

Cairo is an exciting place name possibility with upbeat o ending and an on-trend first syllable. Debuting in the US Top 1000 in 2015, it has been climbing ever since, and, as of 2023, it is given to more than 1000 babies each year.

Caoimhe, pronounced (more properly) kwee-va or kee-va, is a pretty and distinctive Gaelic name but one that could well lead to no end of confusion outside the Irish community. Even in its native habitat, it is sometimes spelled Keeva.

Extremely popular in Ireland, Ciaran is also well used in England and is beginning to be adopted by parents in the U.S., though usually via the more American-friendly Kieran spelling. The Irish spelling is, however, becoming more familiar on this side of the Atlantic, due to the rising popularity of Belfast-born actor Ciaran Hinds.

Infinitely preferable to the tease-inspiring English version of the word.

Carlos is the Spanish and Portuguese variation of Charles, which has been used in solid numbers in the US for as long as data has been kept. Carlos has never fallen out of the Top 600, but peaked from the 70s-early 2000s. Today Carlos is still within the Top 200. Notable namesakes include musician Santana, writers Fuentes and Castaneda, and numerous athletes. Carlos Irwin Estevez is the birth name of Charlie Sheen.

A light and pretty pan-cultural name which can be considered a variant of either the Greek name Selene or Selena, meaning "moon", or of the French Celine, meaning "heavenly". An attractive choice that is surprisingly rare in the US: out of the Top 1000 since 2006.

Camellia is a rare flower name with distinct roots related to the Camille/Camila group and has varied associations to the moon, water, wealth, and perfection. It could be thought of as a floral replacement for Amelia.

This name of a touristed island in sight of Los Angeles makes an attractive and newly stylish variation on the classic Catherine or overused Caitlin.