| Name | Meaning | Gender | Origin |
|---|
| Cj | | Unisex | |
| Claudia | Feminine of Claude.
| Female | Latin |
| Claymore | | Male | Hebrew |
| Clegg | | Unisex | Hebrew |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Cleopatra | glory of the father | Female | Greek |
| Cloud | | Male | Hebrew |
| Clouseau | after Inspector Clouseau from the Pink Panther movies | Unisex | |
| Coby | Supplanter, Representative | Male | English |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Cocoa | cocoa Jumbo | Female | Color |
| Cody | Helpful.
| Male | English |
| Collins | Abbreviation Of Nicholas People`S Victory. | Female | French |
| Columbia | a dove | Female | Latin |
| Commander Wingnut | | Unisex | Hebrew |
| Companion Cube | | Unisex | Hebrew |
| Conan | Hound.
| Male | Irish |
| Confucius | Not available | Male | English |
| Cookie | A small flat, crisp cake | Female | |
| Cookie Monster | | Unisex | Hebrew |
| Cooper | Barrel maker | Male | English |
| Copper | A reddish brown metal - as in copper penny coins. Also slang for a police officer. | Female | Word |