| Nombre | Origen | Evaluación | |
| Cassidy | Gaélico | 3 | |
| Cassivellaunus | Celta | 0 | |
| Cassivellaunus | Celta | 0 | |
| Castor | Griego | 3.66 | |
| Caswallan | Celta | 0 | |
| Cat | Escocés | 0 | |
| Catalin | Rumano | 4.2 | |
| Cath | Arthurian leyenda | 0 | |
| Cathair | Celta | 0 | |
| Cathair | Escocés | 0 | |
| Cathal | Gaélico | 0 | |
| Cathaoir | Celta | 0 | |
| Cathaoir | Gaélico | 0 | |
| Cathbad | Celta | 0 | |
| Cathmor | Gaélicos | 0 | |
| Cathmor | Gaélico | 0 | |
| Cathmore | Gaélico | 0 | |
| Catrell | Desconocido | 0 | |
| Catterik | Arthurian leyenda | 0 | |
| Cauley | Escocés | 0 | |