| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Catherina | kath-ə-REE-nə, kə-THREE-nə | English (Rare) | ||
| Cathrin | KAHT-reen | German | ||
| Cathrine | - | Swedish, Norwegian, Danish | ||
| Catina | - | Romanian | ||
| Cato (1) | - | Ancient Roman | ||
| Catrin | KAT-rin (Welsh), KAHT-reen (German) | Welsh, German | ||
| Cayetano | kie-e-TAH-no | Spanish | ||
| Cayley | KAY-lee | English (Rare) | ||
| Ceadda | - | Anglo-Saxon | ||
| Ceara | - | English (Rare) | ||
| Cearra | - | English (Rare) | ||
| CebriÁN | se-BRYAHN, the-BRYAHN | Spanish | ||
| CecÍLia | - | Portuguese, Slovak, Hungarian | ||
| Cecilia | sə-SEE-lee-ə (English), sə-SEEL-yə (English), che-CHEE-lyah (Italian), the-THEE-lyah (Spanish), se-SEE-lyah (Latin American Spanish), se-SEEL-yah (Danish, Norwegian), SE-see-lee-ah (Finnish) | English, Italian, Spanish, Swedish, Danish, Norwegian, Finnish, Dutch, German | ||
| Cecilie | se-SEEL-ye (Norwegian, Danish) | Norwegian, Danish, Czech |