| Name | Meaning | Gender | Origin |
|---|
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Female | |
| Cacao | | Unisex | Hebrew |
| Canyon | Canyon | Male | English |
| Caribou | | Unisex | Hebrew |
| Carnation | Carnation Flower | Unisex | English |
| Cassiopeia | Clever | Female | Greek |
| Cayenne | Red ground spice from several varieties of capsicum | Female | Word |
| Celeste | heavenly | Female | Latin |
| Cherry | Various trees that produce red to black fruit. | Female | Fruit |
| Chestnut | Deciduous tree with an edible deep reddish brown nut. | Unisex | |
| Chipmunk | | Unisex | Hebrew |
| Cinnabar | | Female | Hebrew |
| Cinnamon | | Female | Hebrew |
| Citron | lemon | Female | |
| Clay | adhere, mortal | Male | English |
| Clementine | mild, merciful | Female | |
| Cliff | From Clifford - From the ford by the cliff. | Unisex | |
| Cloud | | Male | Hebrew |
| Clove | Spice | Male | German |
| Clover | Clover
| Female | |
| Coal | | Male | Hebrew |
| Cobalt | | Male | Hebrew |
| Comet | A celestial body | Female | Nature |
| Condor | | Unisex | Hebrew |
| Copper | A reddish brown metal - as in copper penny coins. Also slang for a police officer. | Female | Word |