| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cynefrith | - | Anglo-Saxon (Latinized) | ||
| Cyneheard | - | Anglo-Saxon | ||
| Cynem&Aelig;R | - | Anglo-Saxon | ||
| Cyneric | - | Anglo-Saxon | ||
| Cynesige | - | Anglo-Saxon | ||
| Cyneweard | - | Anglo-Saxon | ||
| Cynthia | SIN-thee-ə (English) | English, Greek Mythology (Latinized) | ||
| Cynwrig | - | Ancient Celtic | ||
| Cyprianus | - | Ancient Roman | ||
| Cyrano | SIR-ə-no (English) | Literature | ||
| Cyriaca | - | Late Roman | ||
| Cyriacus | - | Late Roman | ||
| Cyril | SIR-əl (English), SEER-əl (English), TSI-ril (Czech) | English, French, Czech, Slovak | ||
| Cyrilla | - | English (Rare) | ||
| Cyrillus | - | Ancient Greek (Latinized) |