| Name | Meaning | Gender | Origin |
|---|
| Comet | A celestial body | Unisex | English |
| Cooper | Barrel maker | Male | English |
| Copper | A reddish brown metal - as in copper penny coins. Also slang for a police officer. | Unisex | English |
| Cosmo | Order | Male | Greek |
| Cujo | | Unisex | Hebrew |
| Dan | Arbiter | Male | Hebrew |
| Dash | From Chiel | Male | French |
| Davis | Beloved | Male | Hebrew |
| Demon | Demon | Unisex | Greek |
| Dewey | Place-Name And Surname: Welsh Form Of David. | Male | English |
| Diesel | | Unisex | Hebrew |
| Digby | Dyke farm, dyke settlement | Male | English |
| Digger | One that digs. | Unisex | English |
| Dinky | Dog on National Lampoon's Vacation | Unisex | English |
| Dino | From The Dene | Male | Italian |
| Dixie | Strong power | Male | English |
| Doc | Short for doctor | Unisex | English |
| Dodger | One that dodges or evades | Unisex | English |
| Dog | Domesticated carnivorous mammal. Dogs exhibit enormous genetic variety with over 2 different breed types. Man's best friend. | Unisex | English |
| Domino | Small, rectangular black and white blocks used in the game of dominos. | Unisex | English |
| Donald | World rule | Male | Gaelic |
| Donnie | World rule | Male | Gaelic |
| Dopey | | Unisex | Hebrew |
| Doug | Black water | Male | Gaelic |
| Dougal | Black stranger | Male | Gaelic |
| Drifter | | Unisex | Hebrew |
| Duchess | From the AristoCats | Unisex | English |
| Dudley | Wood or clearing of Dudda | Male | English |
| Dug | From The Dark Water | Unisex | Scottish |
| Duke | Duke | Male | English |