| Name | Meaning | Gender | Origin |
|---|
| Cinamon | | Male | |
| Cinder | | Unisex | Hebrew |
| Cindy | Abbreviation of Cynthia and Lucinda.
| Female | English |
| Claudette | Feminine of Claude.
| Female | |
| Cloe | Variant of Chloe.
| Female | |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Cody | Helpful.
| Male | English |
| Colin | Strong and virile; victorious army; youth, child, victor | Male | English |
| Conrad | brave counsel | Male | |
| Cookie | A small flat, crisp cake | Female | |
| Corduroy | after the Pearl Jam song | Unisex | |
| Cotton | | Male | Hebrew |
| Cozy | | Unisex | Hebrew |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Cyclops | one eyed monster | Male | |
| Cyril | lordly, proud | Male | Greek |
| Daffy | | Male | Hebrew |
| Daisy | Day's eye. A flower name.
| Female | |
| Daisy | Day's eye. A flower name.
| Female | |
| Dalyell | From the little field
| Male | |
| Danilo | Variant of Daniel God is my judge.
| Male | Ukrainian |
| Dante | lasting | Male | Latin |