| Name | Meaning | Gender | Origin |
|---|
| Bain | From Banbridge, Meaning Fair Bridge | Male | Irish |
| Bainbridge | Lives Near The Bridge Over The White Water | Male | English |
| Baird | minstrel | Male | Scottish |
| Barclay | birch meadow | Male | English |
| Barry | spear thrower, son of Harry, Marksman | Male | Irish |
| Becan | Small
| Male | Irish |
| Bedwyr | Arthurian legend name
| Male | |
| Berta | glorious, learning | Unisex | |
| Blaine | thin, lean, source of a river | Male | Irish |
| Blarney | | Unisex | Hebrew |
| Body | Blond
| Male | |
| Bogart | strong as a bow | Male | Gaelic |
| Bonnie | sweet and good | Female | Scottish |
| Bowden | Blond
| Male | |
| Bowdyn | Blond
| Male | |
| Bowen | Son of Owen
| Male | Welsh |
| Bowie | after David Bowie | Male | Scottish |
| Brady | large-chested | Male | Irish |
| Brayden | brave, broad | Male | Spelling |
| Bree | broth | Female | Irish |
| Brendan | prince | Male | Irish |
| Brennan | Little drop: Prince. Variant of Brendan.
| Male | Irish |
| Bret | Native of Brittany | Unisex | |
| Brett | a native of Brittany, Briton | Male | Celtic |
| Brian | strong | Male | Irish |