Names from a Night at the Opera

English speaking countries may only associate this with the fifth-century Hun, but the name is still well-used in contemporary Hungary, Azerbaijan, and Turkey.

This evocative name of one of the Three Wise Men of the Orient, also spelled Balthasar, may finally be ready for prime time. Balthazar, Melchior and Caspar were the Magi who brought gifts of gold, frankincense and myrrh to the baby Jesus, though their names were not mentioned in the Bible.

Uncommon choice too reminiscent of "bidet". Try Bridie instead.

The simple and attractive Bryn is well used for boys in Wales, and does have a history as a male name in the US, although both Bryn and Brynn are currently far more popular for girls.

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.

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.

Catherine is one of the oldest and most consistently well-used girls’ names, with endless variations and nicknames. The Catherine form feels more gently old-fashioned and feminine than the more popular K versions. Most stylish nickname for Catherine right now: Kate...or Cate, a la Blanchett.

Cecelia, with this spelling, got some recent attention as the name of Jim and Pam's baby on The Office -- and also the name of actress Jenna Fischer's newborn niece. A spelling variation of Cecilia that has a gently old-fashioned feel and several appealing short forms, including Celia, Celie, and, as on the TV show, Cece. Three times as many babies are given the Cecilia spelling as get the Cecelia one, though if you plan on calling your daughter Cece or Celia, Cecelia may feel like the more logical spelling.

Celestine is a pretty, crystalline extension (actually a diminutive) of Celeste that would make a choice that is both delicate and strong. It is also a popular name in France.

The unusual (to English speakers) name Cendrillon is French for Cinderella, though most Americans wouldn't recognize it as such. This might make an excellent middle name for those who are looking for something rare, whimsical, fantastical, and literary. But you must insist on the lovely French pronunciation — if you're choosing a name this uncommon, why not go all the way.

Charlotte, the name of the young Princess of Cambridge, is the latest classic name to join Sophia, Emma, Olivia, and Isabella at the top of the popularity list. It is now among the most popular girl names in many English-speaking and European countries.