| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| 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 | ||
| BrÓNach | - | Irish | ||
| BradÁN | - | Ancient Irish | ||
| Braden | BRAY-dən | English, Irish | ||
| Brady | BRAY-dee | English, Irish |