| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| CIAN | KEE-an, KEEN | Irish, Irish Mythology | ||
| CIANÁN | - | Irish | ||
| CIANNAIT | - | Irish | ||
| CIAR | KEER, KEE-ar | Irish | ||
| CIARÁN | KEER-awn, KEE-ar-awn | Irish | ||
| CIARA (1) | KEER-a, KEE-ar-a | Irish | ||
| CIARA (2) | see-AHR-ə, see-ER-ə | English (Modern) | ||
| CIARDHA | - | Irish | ||
| CIBOR | CHEE-bawr | Polish | ||
| CIBRÁN | thee-BRAN | Galician | ||
| Cicely | ['sisli] | |||
| CICELY | SIS-ə-lee | English | ||
| CICERO | SIS-ə-ro (English) | Ancient Roman | ||
| CIEL | - | Various | ||
| CIERA | see-ER-ə | English (Modern) |