| Name | Meaning | Gender | Origin |
|---|
| Brayden | brave, broad | Male | Spelling |
| Bristles | | Unisex | Hebrew |
| Britches | | Unisex | Hebrew |
| Bronson | son of Brown, son of the dark-skinned one | Male | English |
| Browser | | Unisex | Hebrew |
| Bruce | thicket, woodlands | Male | Scottish |
| Bruiser | A large heavyset man | Unisex | |
| Brutus | heavy, dull | Male | Latin |
| Bubba | | Male | Hebrew |
| Bubba | | Male | Hebrew |
| Bubble | | Unisex | Hebrew |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Buck | A fleet footed youth. Male deer. | Male | English |
| Buckaroo | | Unisex | Hebrew |
| Buckeye | | Unisex | Hebrew |
| Buckshot | | Unisex | Hebrew |
| Buckwheat | | Unisex | Hebrew |
| Buff | | Male | Hebrew |
| Bugsy | | Male | Hebrew |
| Bull | The adult male of certain large animals like cattle and elephants | Unisex | |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Male | |
| Bumble | | Male | Hebrew |
| Bumper | | Unisex | Hebrew |
| Bundle | | Unisex | Hebrew |