| Name | Meaning | Gender | Origin |
|---|
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Cody | Helpful.
| Male | English |
| Colette | victory of the people | Female | |
| Colonel | Army, Air Force or Marine officer ranked above Lieutenant but below Brigadier. | Unisex | |
| 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 |
| Creeper | | Unisex | Hebrew |
| Cruella | | Unisex | Hebrew |
| Daisy | Day's eye. A flower name.
| Female | |
| Daisy | Day's eye. A flower name.
| Female | |
| Dale | Lives in the valley
| Male | English |
| Danny | God Is My Judge | Unisex | English |
| Darla | darling | Female | English |
| Darling | | Unisex | Hebrew |
| Dash | To move with haste, to rush. Punctuation. Long sound in Morse code. | Male | English |
| David | Dearly loved
| Male | Hebrew |
| Deacon | servent, messenger | Male | Greek |
| Deb | Honey Bee | Unisex | English |
| Demetrius | lover of the earth, given to the Earth goddess | Male | Greek |
| Denahi | | Unisex | Hebrew |
| Dewey | Diminutive of Dafydd, Welsh variation of David | Male | Anglicized |
| Dina | From The Valley | Female | English |
| Dipstick | | Unisex | Hebrew |