| Name | Meaning | Gender | Origin |
|---|
| Buddy | From Budd - The welcome messenger. | Male | English |
| Buster | One that breaks up something | Male | Modern |
| Butch | Masculine in appearance or manner. | Male | Nickname |
| Caleb | The bold one | Male | Hebrew |
| Cali | Most beautiful
| Female | English |
| Callie | Lark
| Female | Greek |
| Caroline | strong, melody, song | Female | |
| Casey | brave, watchful | Male | Irish |
| Cason | Shining On Mankind | Male | English |
| Casper | Master of the treasure | Male | Dutch |
| Cassie | Abbreviation of Cassandra. Unheeded prophetess. In Homer's The Iliad Cassandra's prediction of the fall of Troy was unheeded.
| Female | English |
| Cassius | hollow | Male | Latin |
| Charles | manly, strong | Male | |
| Charlie | a man: variant of Carl.
| Male | English |
| Charlotte | petite and femininewoman, feminine of Charles | Female | |
| Chester | fortress, walled town, | Male | Latin |
| Chico | Spanish for little | Male | Spanish |
| Chloe | Fresh young blossom, Greek for blooming | Female | Greek |
| Christian | annointed, follows Christ | Male | Greek |
| Claire | bright, clear | Female | |
| Clara | bright, clear | Female | Latin |
| Clementine | mild, merciful | Female | |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Clyde | Nature name | Male | Scottish |