| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| CUSTÓDIO | - | Portuguese | ||
| CUSTODIA | - | Spanish | ||
| CUSTODIO | - | Spanish | ||
| CUTHBERHT | - | Anglo-Saxon | ||
| CUTHBERT | KUTH-burt | English (Rare) | ||
| Cutler | ['kʌtlə] | |||
| CVETA | - | Serbian | ||
| CVETKA | - | Slovene | ||
| CVETKO | - | Slovene | ||
| CVIJETA | TSVEE-e-tah | Croatian, Serbian | ||
| CVITA | TSVEE-tah | Croatian | ||
| CY | SIE | English | ||
| CYAN | SIE-an | English (Rare) | ||
| CYBELE | SIB-ə-lee (English) | Near Eastern Mythology (Hellenized) | ||
| CYBILL | SIB-əl | English (Rare) |