| Name | Meaning | Gender | Origin |
|---|
| Butch | Masculine in appearance or manner. | Male | Nickname |
| Caillou | after the cartoon character | Unisex | |
| Carla | Manly | Female | Italian |
| Casper | Master of the treasure | Male | Dutch |
| Cat | pure | Female | English |
| Cat | pure | Female | English |
| Cat Woman | | Unisex | Hebrew |
| Catillac | play on Cadillac | Unisex | |
| Chance | French for luck | Male | |
| Chaos | Kay-oss | Male | |
| Cheshire | | Unisex | Hebrew |
| Chi | Tree Branch | Unisex | Vietnamese |
| Chowder | | Unisex | Hebrew |
| Church | | Unisex | Hebrew |
| Claude | Lame.
| Male | |
| Claw | | 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 |
| Coricopat | | Unisex | Hebrew |
| Cricket | A leaping insect | Female | Nature |
| Crookshanks | Hermione's cat in the Harry Potter books | Unisex | |
| Crookshanks | | Unisex | Hebrew |
| Daffie | | Unisex | Hebrew |
| Daffy | | Male | Hebrew |
| Danny | God Is My Judge | Unisex | English |