| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| ColmÁN | - | Irish | ||
| Colum | - | Irish | ||
| Columban | kə-LUM-bən (English) | Irish | ||
| Comgal | - | Irish | ||
| Comgall | - | Irish | ||
| Comgan | - | Irish | ||
| ComhghÁN | - | Irish | ||
| Comhghall | - | Irish | ||
| Conall | - | Irish, Scottish, Irish Mythology | ||
| Conan | - | Irish | ||
| Concepta | - | Irish | ||
| ConchÚR | - | Irish, Irish Mythology | ||
| Conchobhar | - | Irish, Irish Mythology | ||
| Conlaoch | - | Irish Mythology | ||
| Conleth | - | Irish |