| Name | Meaning | Gender | Origin |
|---|
| Chyna | Middle Country | Unisex | English |
| Cinder | | Unisex | Hebrew |
| Cinders | | Unisex | Hebrew |
| Cindy | Abbreviation of Cynthia and Lucinda.
| Female | English |
| Cinnamon | | Female | Hebrew |
| Cj | | Unisex | |
| Clarissa | bright, clear | Female | Latinized |
| Claudette | Feminine of Claude.
| Female | |
| Claudia | Feminine of Claude.
| Female | Latin |
| Cleopatra | glory of the father | Female | Greek |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Cocoa | cocoa Jumbo | Female | Color |
| Coffee | | Unisex | Hebrew |
| Cola | Carbonated soft drink made in part from extract of the cola nut. | Unisex | |
| Colette | victory of the people | Female | |
| Colonel | Army, Air Force or Marine officer ranked above Lieutenant but below Brigadier. | Unisex | |
| Columbine | Dove | Unisex | English |
| Comet | A celestial body | Female | Nature |
| Constance | steadfastness | Female | English |
| Cookie | A small flat, crisp cake | Female | |
| Copernicus | | Unisex | Hebrew |
| Copper | A reddish brown metal - as in copper penny coins. Also slang for a police officer. | Female | Word |
| Copper | A reddish brown metal - as in copper penny coins. Also slang for a police officer. | Female | Word |