| Name | Meaning | Gender | Origin |
|---|
| Clark | cleric, scholar | Male | English |
| Claude | Lame.
| Male | |
| Clifton | place on a cliff | Male | English |
| Clint | English, hilltop town | Male | English |
| Clooney | after the actor George Clooney | Male | Irish |
| Cody | Helpful.
| Male | English |
| Colby | coal town | Male | English |
| Colby | coal town | Male | English |
| Cole | coal, victory of the people | Male | English |
| Colin | Strong and virile; victorious army; youth, child, victor | Male | English |
| Columbo | dove | Male | Latin |
| Conan | Hound.
| Male | Irish |
| Connie | Constant, Firm | Male | English |
| Connor | lover of hounds | Male | Irish |
| Conrad | brave counsel | Male | |
| Cooper | Barrel maker | Male | English |
| Corbin | from the movie The Fifth Element | Male | Latin |
| Cornell | Wilde-Cat | Male | British |
| Cruz | cross | Male | Spanish |
| Cuba | Island country in the Caribbean. | Male | Place-name |
| Cupid | desire | Male | Latin |
| Curran | descendant of Curran | Male | Irish |
| Curtis | courteous, polite | Male | |
| Cyclops | one eyed monster | Male | |
| Cyrus | throne | Male | Persian |