| Name | Meaning | Gender | Origin |
|---|
| Cookie | A small flat, crisp cake | Unisex | English |
| Cora | Maiden | Female | Greek |
| Coral | Coral | Female | English |
| Corona | Crown | Unisex | Latin |
| Crash | To smash into things, to break or dash to pieces. To join a party without invitation. | Unisex | English |
| Crimson | Crimson, red | Unisex | English |
| Critter | | Unisex | Hebrew |
| Cuddles | To nestle or snuggle. | Unisex | English |
| Cujo | | Unisex | Hebrew |
| Cupcake | Small cake baked in a cup shaped container | Unisex | English |
| Cupid | Desire | Unisex | Latin |
| Daisy | Day's eye | Female | English |
| Dakota | The allies | Female | Native American |
| Danger | | Unisex | Hebrew |
| Daria | Maintain well | Female | Persian |
| Darla | From The Old English Dearling: Darling. | Female | American English |
| Darlene | "Tenderly Loved." Some Variants Include Darel, Darelene, Darelle, Darline, And Daryl. | Female | American English |
| Davinci | After Leonardo Da Vinci | Unisex | English |
| Deja | Already | Female | French |
| Delta | Fourth letter of the alphabet | Female | Greek |
| Demon | Demon | Unisex | Greek |
| Deuce | | Unisex | Hebrew |
| Deva | Divine | Female | Sanskrit |
| Diamond | Precious gemstone | Unisex | English |
| Diesel | | Unisex | Hebrew |
| Dizzy | | Unisex | Hebrew |
| Doughnut | | Unisex | Hebrew |
| Dude | | Unisex | Hebrew |
| Dumbo | | Unisex | Hebrew |
| Echo | Echo | Female | Greek |