| Corey | Seething Pool | Male |
| Corinna | | Female |
| Cort | Honest Advisor | Male |
| Courtney | Courtier: Court Attendant. | Male |
| Craig | Dwells At The Crag | Male |
| Crevan | Fox | Male |
| Crispin | Curly-Haired. The 3Rd Century Martyr St. Crispin Is Known As Patron Of Shoemakers. | Male |
| Cronus | Myth Name (A Titan) | Male |
| Crystal | Sparkling | Female |
| Culhwch | Arthur's Nephew | Male |
| Culver | Dove | Male |
| Cybele | Myth Name (Mother Of Olympians) | Female |
| Cyndi | Abbreviation Of Cynthia And Lucinda. | Female |
| Cynthia | Moon | Female |
| Darcy | From Arcy | Female |
| Daedalus | Myth Name (Killed His Nephew) | Male |
| Dagan | Grain | Male |
| Dahlia | Valley | Female |
| Daire | Wealthy | Male |
| Daisy | "The Day's Eye." | Female |
| Dalia | Gentle. | Female |
| Dalila | Swahili Name Meaning "Gentle." | Female |
| Dallas | Dwells By The Waterfall | Male |
| Damayanti | Name Of A Princess | Female |
| Damia | Myth Name | Female |