| Name | Meaning | Details |
|---|---|---|
| Ciara | Black-haired Or Dark-skinned | View Details |
| Crispin | Curly Haired | View Details |
| Crispina | Curly Haired | View Details |
| Crispus | Curly-Haired | View Details |
| Cyan | Light Blue-Green | View Details |
| Devin | Descendant Of The Dark-haired One | View Details |
| Dolan | Dark Haired | View Details |
| Doli | Bluebird | View Details |
| Donahue | Brown-haired Chieftain | View Details |
| Donnelly | Brown-haired Chieftain | View Details |
| Dooley | Blackhaired Hero | View Details |
| Douglas | Black Blue | View Details |
| Fairfax | Fair Haired | View Details |
| Faxon | Thick-Haired | View Details |
| Fionn | Fair-haired | View Details |