| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| BlÁThnat | BLAW-nit | Irish, Irish Mythology | ||
| Bran (1) | BRAN | Irish, Irish Mythology | ||
| Bridget | BRIJ-ət (English) | Irish, English, Irish Mythology | ||
| Brighid | BRIED | Irish, Irish Mythology | ||
| Brigid | - | Irish, Irish Mythology | ||
| Brigit | - | Irish Mythology | ||
| CÁEl | - | Irish Mythology | ||
| CÉIbhfhionn | - | Irish Mythology | ||
| CÚChulainn | - | Irish Mythology | ||
| Cian | KEE-an, KEEN | Irish, Irish Mythology | ||
| ClÍDna | - | Irish Mythology | ||
| ClÍOdhna | KLEE-u-na | Irish, Irish Mythology | ||
| Conall | - | Irish, Scottish, Irish Mythology | ||
| ConchÚR | - | Irish, Irish Mythology | ||
| Conchobhar | - | Irish, Irish Mythology |