| Name | Meaning | Gender | Origin |
|---|
| Colette | victory of the people | Female | |
| Colonel | Army, Air Force or Marine officer ranked above Lieutenant but below Brigadier. | Unisex | |
| Columbia | a dove | Female | Latin |
| Comus | | 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 |
| Coral | Greek for small stone. Sincere or from the sea. Marine animal whose skeletons form coral reefs. | Female | Nature |
| Coriander | | Unisex | |
| Creeper | | Unisex | Hebrew |
| Crocus | | Female | Hebrew |
| Cruella | | Unisex | Hebrew |
| Crybaby | | Unisex | Hebrew |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Cubby | | Unisex | Hebrew |
| Cypress | Cypress Tree | Female | Latin |
| D.C. | Dynamite Companion | Unisex | |
| Dagda | | Unisex | Hebrew |
| Dahlia | Flower Named For Botanist A. Dahl | Female | Greek |
| Daisy | Day's eye. A flower name.
| Female | |
| Daisy | Day's eye. A flower name.
| Female | |
| Danielle | God is my judge
| Female | Hebrew |
| Danny | God Is My Judge | Unisex | English |
| Danu | | Female | Hebrew |