| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Bearach | - | Irish | ||
| Bedelia | - | Irish | ||
| Berach | BAHR-akh | Irish | ||
| Bevin | - | Irish | ||
| Biddy | BID-ee | Irish, English | ||
| Bidelia | - | Irish | ||
| Bile | - | Irish Mythology | ||
| BlÁIthÍN | - | Irish | ||
| BlÁThnaid | - | Irish | ||
| BlÁThnat | BLAW-nit | Irish, Irish Mythology | ||
| Blanid | - | Irish | ||
| BrÁDach | - | Irish | ||
| BrÉAnainn | - | Ancient Irish | ||
| BrÍD | - | Irish | ||
| BrÍGh | BREE | Irish |