| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cynthia | ['sinθjə] | |||
| CYNTHIA | SIN-thee-ə (English) | English, Greek Mythology (Latinized) | ||
| CYNWRIG | - | Ancient Celtic | ||
| CYPRIAN | SIP-ree-ən (English) | History | ||
| CYPRIANUS | - | Ancient Roman | ||
| CYRA | - | History | ||
| CYRANO | SIR-ə-no (English) | Literature | ||
| CYRIACA | - | Late Roman | ||
| CYRIACUS | - | Late Roman | ||
| CYRIELLE | - | French | ||
| Cyril | ['siril] | |||
| CYRIL | SIR-əl (English), SEER-əl (English), TSI-ril (Czech) | English, French, Czech, Slovak | ||
| CYRILLA | - | English (Rare) | ||
| CYRILLE | see-REEL | French | ||
| CYRILLUS | - | Ancient Greek (Latinized) |