| Name | Meaning | Gender | Origin |
|---|
| Buck | He-goat | Male | English |
| Buddy | Herald | Male | English |
| Bugsy | | Unisex | Hebrew |
| Bumper | | Unisex | Hebrew |
| Bunny | Little rabbit | Female | English |
| Buster | One that breaks up something | Unisex | American English |
| Butch | Masculine in appearance or manner. | Unisex | American English |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Buttons | | Unisex | Hebrew |
| Buzz | To move quickly and busily, to bustle | Male | English |
| Byron | At the cattle sheds | Male | English |
| Caesar | Long Hair | Male | Latin |
| Callie | Most beautiful | Female | Greek |
| Candy | Honest | Female | Latin |
| Caprice | Whim | Female | French |
| Captain | A captain | Unisex | English |
| Carlos | Free man | Male | German |
| Carly | Free man | Female | German |
| Carmela | Garden | Female | Hebrew |
| Carolina | Free man | Female | German |
| Carolyn | Free man | Female | German |
| Carrie | Abbreviation Of Carol And Caroline From The Masculine Charles Meaning Manly | Female | English |
| Casey | From Cayce | Male | American English |
| Casper | Treasurer | Male | Persian |
| Cassie | She who entangles men | Female | Greek |
| Castor | Beaver | Unisex | Greek |
| Chad | Defense | Male | English |
| Charlene | Free man | Female | German |
| Charles | Free man | Male | Germanic |
| Charlie | Free man | Unisex | Germanic |