Cool C's

An Irish and Welsh form of Catherine, Caitlin was a boom name of the eighties, rocketing from obscurity (Americans first heard it via the wife of doomed poet Dylan Thomas) to the height of popularity in the space of a decade. The original name was gradually eclipsed by its myriad spelling variations -- Katelyn and Kaitlyn both soon topping it on the popularity lists.

Callum, a charming Scottish name high on the list in England, Scotland and Northern Ireland, is rising through the ranks in the US now too. And it comes complete with the easy nickname Cal.

Calvin is a slightly quirky but cozy name that has a fashion edge thanks to Calvin Klein. It has been steadily on the popularity list since records were kept, never lower than Number 250, peaking in the 1920s, the era of the Calvin (originally John Calvin ) Coolidge presidency.

With its friendly, sensitive, and approachable feel, Cameron is a 90’s favorite that remains popular today. It has a pleasing balance of soft and strong sounds, and holds unisex appeal, thanks to Cameron Diaz.

The Spanish Camila, pronounced ka-MEE-la, is the fastest rising version of this ancient Roman name, but recent royal Camilla may have helped promote the British brand. In Roman myth, Camilla was a swift-footed huntress so fast she could run over a field without bending a blade of grass.

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.

Cara is a simple, sweet, Italian endearment that enjoyed its greatest popularity from the 1970s through the 1990s, reaching a high of Number 189 in 1977. Though the name has been on the decline in recent years, that could change soon due to the rising celebrity of English model/actress Cara Delevingne, who played Enchantress in Suicide Squad. Cara is a highly popular choice in Ireland.

Carina is a pretty feminissima name whose fall from popularity may be speeded by similarity to (hurricane name) Katrina.

Trending down, along with others of both the Car and the issa groups.

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.

Though a couple of its more "creative" spellings—Carli and Karlee, for example—are still on the rise, this feminine form of Carl, popularized by singer Carly Simon in the 1970s, could by no stretch be considered fashionable. Despite its decline, the name has still seen some use in the entertainment industry, from Nickelodeon's iCarly to Canadian pop singer Carly Rae Jepsen.

Languid, romantic, and classy, this variation heats up Caroline and modernizes Carol, adding a southern accent.

Caroline is a perennial classic, one of the elite group of girls' names that's ALWAYS ranked among the Top 1000 and that's been in the Top 100 since 1994. Elegant yet strong, Caroline calls to mind the Kennedy Camelot years and Princess Caroline of Monaco.

If your ancestry is Italian, you may want to consider this elegant twist on a classic.

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.

Cayden is one of the many spellings of this popular name, made all the more popular when they're counted together. According to our annual Playground Analysis, Cayden and brothers rank a cumulative Number 14 among boys' names, given last year to more than 11,000 baby boys in the US.

Caylee was the third fastest-rising name in 2009 and peaked then at Number 263, but has since dropped in the charts, perhaps due to the Caylee Anthony association.

Celeste is a softly pretty and somewhat quaint name with heavenly overtones, which kids might associate with Queen Celeste of Babar's elephant kingdom. She's a light and lovely choice that's finally getting noticed.

Celestia is a heavenly name that sounds more ethereal than Celeste, Celestia might make a distinctive, feminine choice if your taste runs toward names like Angelina and Seraphina.

Cerelia is a melodic and unusual choice, perfect for a child born in April or May. Another version is Cerella.