| Name | Meaning | Gender | Origin |
|---|
| Claudia | Feminine of Claude.
| Female | Latin |
| Clay | adhere, mortal | Male | English |
| Cleopatra | glory of the father | Female | Greek |
| Clooney | after the actor George Clooney | Male | Irish |
| Cloud | | Male | Hebrew |
| Clyde | Nature name | Male | Scottish |
| Coal | | Male | Hebrew |
| 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 |
| Coffee | | Unisex | Hebrew |
| Cola | Carbonated soft drink made in part from extract of the cola nut. | Unisex | |
| Cole | coal, victory of the people | Male | English |
| Colette | victory of the people | Female | |
| Colonel | Army, Air Force or Marine officer ranked above Lieutenant but below Brigadier. | Unisex | |
| Colt | From The Dark Town | Male | English |
| Coltrane | Variant Of Colt Young Horse;Frisky. | Male | English |
| Columbine | Dove | Unisex | English |
| Comet | A celestial body | Female | Nature |
| Confucius | Not available | Male | English |
| Constance | steadfastness | Female | English |
| Cookie | A small flat, crisp cake | Female | |
| Copernicus | | Unisex | Hebrew |