| Name | Meaning | Gender | Origin |
|---|
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Cocoa | cocoa Jumbo | Female | Color |
| Coconut | Edible white flesh of the coconut palm tree. | Unisex | |
| Colby Jack | | Unisex | Hebrew |
| Comet | A celestial body | Female | Nature |
| Contessa | | Unisex | Hebrew |
| Cookie | A small flat, crisp cake | Female | |
| 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 |
| Cori | Maiden | Unisex | English |
| Cozmo | | Unisex | Hebrew |
| Cricket | A leaping insect | Female | Nature |
| Cringer | after the tiger in the He-Man cartoon | Unisex | |
| Cris | Anointed, Follower Of Christ | Unisex | English |
| Crookshanks | Hermione's cat in the Harry Potter books | Unisex | |
| Crookshanks | | Unisex | Hebrew |
| Cruiser | | Unisex | Hebrew |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| D. Claude Cat | | Unisex | Hebrew |
| Daisy | Day's eye. A flower name.
| Female | |
| Daisy | Day's eye. A flower name.
| Female | |
| Dandelion | A yellow rosette shaped flower. | Unisex | |
| Danny | God Is My Judge | Unisex | English |