| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| CYDNEY | SID-nee | English (Modern) | ||
| CYMBELINE | SIM-bə-leen (English) | Literature | ||
| CYMONE | see-MON | English (Rare) | ||
| CYNBEL | - | Ancient Celtic | ||
| CYNDI | SIN-dee | English | ||
| CYNEBALD | - | Anglo-Saxon | ||
| CYNEBURG | - | Anglo-Saxon | ||
| CYNEBURGA | - | Anglo-Saxon (Latinized) | ||
| CYNEFRIÐ | - | Anglo-Saxon | ||
| CYNEFRITH | - | Anglo-Saxon (Latinized) | ||
| CYNEHEARD | - | Anglo-Saxon | ||
| CYNEMÆR | - | Anglo-Saxon | ||
| CYNERIC | - | Anglo-Saxon | ||
| CYNESIGE | - | Anglo-Saxon | ||
| CYNEWEARD | - | Anglo-Saxon |