| Name | Meaning | Gender | Origin |
|---|
| Clooney | after the actor George Clooney | Male | Irish |
| Cody | Helpful.
| Male | English |
| Coffee | | Unisex | Hebrew |
| Colombo | | Unisex | Hebrew |
| Colonel | Army, Air Force or Marine officer ranked above Lieutenant but below Brigadier. | Unisex | |
| Columbus | Capital of Ohio, USA. | Male | English |
| Cookie | A small flat, crisp cake | Female | |
| Cooper | Barrel maker | Male | English |
| Copernicus | | Unisex | Hebrew |
| Copy Cat | | Unisex | Hebrew |
| Corazon | Heart | Unisex | Filipino |
| Corona | Brand of Mexican beer | Female | Spanish |
| Cosmo | Order, universe.
| Male | Italian |
| Coup | | Unisex | Hebrew |
| Cowboy | | Female | Hebrew |
| Cozmo | | Unisex | Hebrew |
| Crawford | ford where crows gather | Male | English |
| Cricket | A leaping insect | Female | Nature |
| Crimson | A deep of vivid red colour. | Female | Color |
| Cubby | | Unisex | Hebrew |
| Cupcake | Small cake baked in a cup shaped container | Unisex | |
| Cyclone | A violent rotating windstorm. | Unisex | |
| Cyril | lordly, proud | Male | Greek |
| Dancer | | Male | Hebrew |
| Danger | | Male | Hebrew |