| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Bedivere | - | Welsh Mythology, Arthurian Romance | ||
| Bedwyr | BED-wir (Welsh) | Welsh, Welsh Mythology, Arthurian Romance | ||
| Beli | - | Welsh Mythology | ||
| Berwyn | - | Welsh | ||
| Bethan | BETH-an | Welsh | ||
| Betrys | BET-rees | Welsh | ||
| Bevan | - | Welsh | ||
| Bleddyn | BLEDH-in | Welsh | ||
| Blodeuwedd | - | Welsh, Welsh Mythology | ||
| Blodeuyn | - | Welsh | ||
| Blodwen | BLOD-wen | Welsh | ||
| BrÂN | BRAHN | Welsh Mythology | ||
| Bran (2) | BRAHN | Welsh, Welsh Mythology | ||
| Branwen | BRAN-wen | Welsh, Welsh Mythology | ||
| Briallen | bree-AHSH-en | Welsh |