Strong and modern, Cade shot up the popularity lists around the millennium—it was as high as Number 201 in 2001. Now, it has declined in popularity slightly, but nevertheless remains in the US Top 300, given to around 1200 babies each year. Combined with all the baby Kades, Cadens, Kaidens and Kaydens however, it might feel even more popular that it actually is.

Crew is yet another word name that was added to the baby name lexicon when this one was chosen by The Young and the Restless star Joshua Morrow for his son. It debuted on the Top 1000 in 2010. We've also heard spelling variations Cru and Crue.

Carter has ranked in the Top 100 since the the turn of the millennium, but despite its recent popularity, it's not a trendy new name. In fact, Carter is one of those names that just misses ranking in the US Top 1000 for its entire 140+ year history.

Carson is one of the most long-running popular androgynous baby names, with a dash of the Wild West via the legendary Missouri frontiersman Kit Carson. Dating back to when it was the name of Nancy Drew's Dad, Carson is still steadily in the Top 200 baby names.

In the early 1990s, Cody was in the Top 25 most popular boys' names in the USA; but it has been in decline since then. It retains a greater degree of popularity in the UK, however. Cody might be short for Dakota but despite its nickname feeling, it's a name of its own.

For a single-syllable Latino surname, this new popular kid on the block packs a lot of energy and charm and is one of the most stylish Spanish names for boys in general use today. Victoria and David Beckham named their third son Cruz, following Brooklyn and Romeo, and it was also picked up on by tennis star Lleyton Hewitt for his son. Other parents may prize its Christian associations.

The name Christian has fallen a bit from its 90's and 00's heights, but it's still quite popular. Once considered overly pious, Christian is now seen as making a bold statement of faith by some, while also having secular appeal for others. Christian's enduring popularity may be influenced by such celebrities as Christian Slater and Christian Bale, not to mention the fashion world's Dior, Lacroix, Louboutin and Audigier.

After half a century, this otherwise feasible name has at last started to lose its link to the friendly ghost; it certainly didn't scare model Claudia Schiffer, who chose it for her son, as did Atomic Kitten Jenny Frost. Iconoclastic namer Jason Lee switched genders and called his daughter Casper. Also related to the revived Jasper, Caspar seems headed towards the path to a similar resurgence.

Biblical name Cain was, until recently, seldom heard outside of the Old Testament and soap operas. Although Cain's murderous actions will always make this name difficult for some, Cain, Eve and Adam's firstborn, was a farmer - making this a good choice for those with farming connections. Long outshone by Abel, Cain is starting to find a broader audience, helped along by homophones Kane or Caine.

Caden is a key member of the rhyming contingent that includes Aiden, Jayden, Kayden, Brayden et al. It may derive from the Celtic Cadan or Irish Cathán, both from the same root meaning "battle". It is also possible it comes from Cade, meaning "round" or "barrel".

Clayton is one of those names that feels like it could be recently popular but does in fact have a long history of use. It has made the US Top 400 every year since the records began, and though more recently it has been in decline, it is still given to more than 1000 babies every year

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.

Clay is a rich, earthy one-syllable name with a southern-inflected handsome-rogue image, featured on soap operas and reality TV. Its longer forms are Clayton and Clayborne.

Kaius is a K-ization of the Latin Caius, the name of an ancient poet, introduced by style maven Rachel Zoe. More recently, it was used by Derek Jeter for his son.

Callen is a unisex Gaelic name growing in popularity here. Its newfound trendiness is possibly related to the Chris O'Donnell character on "NCIS: Los Angeles", known only as G. Callen. Jazz musician Cal Tjader's full name is Callen.

Colt is the kind of unconventionally macho name that is so trendy right now, because of or in spite of its association with horses and guns. A rent study of voter names by political party found that more than 80 percent of the voters named Colt vote red.

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.

A popular member of the -ayden family, Kaden ranks alongside Kaiden, Kayden, Kasen, Kade, Caiden, Cade, and Caden in the US Top 1000. A 90s invention that took off in the 2000s, Kaden is concise and modern, with its popular K initial.

One of several Anglicized forms of Caolán, this spelling is borrowed from the Old Irish root, cáel.

Contemporary Kairo fits in with the modern trend of substituting a C for a K initial, and in this case, it works to get you more easily to the cool nickname Kai. In fact, parents in the US and the UK see it as working so well that Kairo took over from Cairo as the preferred spelling of the name back in 2018. Given to nearly 1500 babies each year, Kairo is in the US and UK Top 300.