| Name | Meaning | Gender | Origin |
|---|
| Coke | Short for the most famous brand of soft drink, Coca-Cola. | Unisex | |
| Cola | Carbonated soft drink made in part from extract of the cola nut. | Unisex | |
| Colby | coal town | Male | English |
| Colby | coal town | Male | English |
| Cole | coal, victory of the people | Male | English |
| Colorado | | Male | Hebrew |
| Columbine | Dove | Unisex | English |
| Comstock | | 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 |
| Coral | Greek for small stone. Sincere or from the sea. Marine animal whose skeletons form coral reefs. | Female | Nature |
| Corey | raven, from the hollow | Male | Irish |
| Cornbread | | Unisex | Hebrew |
| Cornelius | horn | Male | Latin |
| Cotton | | Male | Hebrew |
| Cressida | gold | Female | Greek |
| Cricket | A leaping insect | Female | Nature |
| Crimson | A deep of vivid red colour. | Female | Color |
| Crow | | Male | Hebrew |
| Crusty | | Unisex | Hebrew |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Custard | A dessert made from milk and eggs, creamy yellow in appearance. | Unisex | |
| Cyan | greenish blue color | Male | English |
| Cypress | Cypress Tree | Female | Latin |