| Name | Meaning | Gender | Origin |
|---|
| Clawed Monet | | Unisex | Hebrew |
| Claws | | Unisex | Hebrew |
| Claymore | | Male | Hebrew |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Cleocatra | | Unisex | Hebrew |
| Cloud | | Male | Hebrew |
| Club Flush | | Unisex | |
| Clubs | | Unisex | |
| Coca-Cola | | Unisex | |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Coffee Bean | | Unisex | Hebrew |
| Comet | A celestial body | Female | Nature |
| Confucius | Not available | Male | English |
| Cooter | | 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 |
| Corky | Lively, buoyant. | Unisex | |
| Cornflake | | Unisex | Hebrew |
| Cuddles | To nestle or snuggle. | Unisex | |
| Cujo | | Unisex | Hebrew |
| Cupcake | Small cake baked in a cup shaped container | Unisex | |
| Cutie | A cute character. | Female | |