| Name | Meaning | Gender | Origin |
|---|
| 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 |
| Coral | Greek for small stone. Sincere or from the sea. Marine animal whose skeletons form coral reefs. | Female | Nature |
| Coriander | | Unisex | |
| Corky | Lively, buoyant. | Unisex | |
| Cornelius | horn | Male | Latin |
| Corona | Brand of Mexican beer | Female | Spanish |
| Cosmo | Order, universe.
| Male | Italian |
| Cosmo Jack | | Unisex | Hebrew |
| Couscous | | Unisex | Hebrew |
| Crackers | | Unisex | Hebrew |
| Crater | | Unisex | Hebrew |
| Creeper | | Unisex | Hebrew |
| Cricket | A leaping insect | Female | Nature |
| Crimson | A deep of vivid red colour. | Female | Color |
| Crocker | | Unisex | Hebrew |
| Crockett | large curl | Male | English |
| Crow | | Male | Hebrew |
| Crumpet | | Unisex | Hebrew |
| Crusader | | Unisex | Hebrew |
| Cruz | cross | Male | Spanish |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Cub | | Unisex | |
| Cuddles | To nestle or snuggle. | Unisex | |