| Name | Meaning | Gender | Origin |
|---|
| Clio | praise, muse of history | Female | Greek |
| Clouseau | after Inspector Clouseau from the Pink Panther movies | Unisex | |
| Clove | Spice | Male | German |
| Clover | Clover
| Female | |
| Clyde | Nature name | Male | Scottish |
| Coal | | Male | Hebrew |
| Coco | A pet name.
| Female | Spanish |
| 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 | |
| Cody | Helpful.
| Male | English |
| Coffee | | Unisex | Hebrew |
| Colette | victory of the people | Female | |
| Colonel | Army, Air Force or Marine officer ranked above Lieutenant but below Brigadier. | Unisex | |
| Colt | From The Dark Town | Male | English |
| Columbia | a dove | Female | Latin |
| Comus | | Unisex | Hebrew |
| Cookie | A small flat, crisp cake | Female | |
| Cooper | Barrel maker | Male | English |
| 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 | |
| Cornelius | horn | Male | Latin |