| Clara | Woman | Latin Names |
| Clarissa | Woman | Latin Names |
| Claude | Man | Latin Names |
| Claudia | Woman | Latin Names |
| Claudio | Man | Latin Names |
| Claudius | Man | Latin Names |
| Clemens | Man | Latin Names |
| Clodia | Woman | Latin Names |
| Columbia | Woman | Latin Names |
| Columbus | Man | Latin Names |
| Concordia | Woman | Latin Names |
| Constantine | Man | Latin Names |
| Consus | Man | Latin Names |
| Coriolanus | Man | Latin Names |
| Cornelia | Woman | Latin Names |
| Cornelius | Man | Latin Names |
| Corvus | Man | Latin Names |
| Crete | Woman | Latin Names |
| Crispin | Man | Latin Names |
| Crispus | Man | Latin Names |