| Name | Meaning | Gender | Origin |
|---|
| Cleo | Of a well known father | Female | Greek |
| Coco | A Pet Name. | Unisex | French |
| Cody | Descendant of Cuidighthigh | Male | Gaelic |
| Coffee | | Unisex | Hebrew |
| Comet | A celestial body | Unisex | English |
| Cookie | A small flat, crisp cake | Unisex | English |
| Cooper | Barrel maker | Male | English |
| Coralie | Maiden | Female | Greek |
| Cosmo | Order | Male | Greek |
| Cowboy | | Unisex | Hebrew |
| Crash | To smash into things, to break or dash to pieces. To join a party without invitation. | Unisex | English |
| Cruiser | | Unisex | Hebrew |
| Cuddles | To nestle or snuggle. | Unisex | English |
| Cupid | Desire | Unisex | Latin |
| Cutie | A cute character. | Unisex | English |
| Daisy | Day's eye | Female | English |
| Dallas | Meadow stance | Male | Gaelic |
| Danni | God is my judge | Unisex | Hebrew |
| Darcy | From Arcy | Female | English |
| Dash | From Chiel | Male | French |
| Dasher | | Unisex | Hebrew |
| Delilah | Desired | Female | Hebrew |
| Della | Noble | Female | Germanic |
| Dewey | Place-Name And Surname: Welsh Form Of David. | Male | English |
| Dinky | Dog on National Lampoon's Vacation | Unisex | English |
| Dippy | | Unisex | Hebrew |
| Dixon | Son of Dick | Male | English |
| Dizzy | | Unisex | Hebrew |
| Domino | Small, rectangular black and white blocks used in the game of dominos. | Unisex | English |
| Donny | World rule | Male | Gaelic |