| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ciara (2) | see-AHR-ə, see-ER-ə | English (Modern) | ||
| Cicely | SIS-ə-lee | English | ||
| Cicero | SIS-ə-ro (English) | Ancient Roman | ||
| Ciera | see-ER-ə | English (Modern) | ||
| Cierra | see-ER-ə | English (Modern) | ||
| Cila | - | Slovene, Croatian | ||
| Cilka | - | Slovene | ||
| Cindi | SIN-dee | English | ||
| Cindra | SIN-drə | English (Rare) | ||
| Cindy | SIN-dee | English | ||
| Ciril | - | Slovene | ||
| Cirila | - | Slovene | ||
| Cissy | SIS-ee | English | ||
| ClÉMence | kle-MAWNS | French | ||
| ClÉMent | kle-MAWN | French |