| Name | Meaning | Gender | Origin |
|---|
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boone | Good | Male | French |
| Borden | Boar pasture | Male | English |
| Boris | Battle, fight | Male | Slavonic |
| Boston | Botolph's town | Unisex | English |
| Bowser | | Unisex | Hebrew |
| Brand | Sword | Male | Germanic |
| Brendan | Prince | Male | Gaelic |
| Brick | Bridge. | Male | English |
| Bridget | The exalted one | Female | Gaelic |
| Brock | Badger | Male | English |
| Brody | Muddy place | Male | Gaelic |
| Bronson | Brown's son | Male | English |
| Brooklyn | Uncertain, perhaps broken land | Unisex | Dutch |
| Brownie | Moist chocolate cake with nuts | Unisex | English |
| Bruce | Surname Since Medieval Times: Now A Common Given Name. Folklore Tale Of 14Th Century Robert King Of Scotland: (The Bruce) Who Learned The Value Of Perseverance From Watching A Spider Spin A Web. | Male | English |
| Bruiser | A large heavyset man | Unisex | English |
| Bruno | Armour | Male | Germanic |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Bryant | Noble, strong, virtuous | Male | Gaelic |
| Bryn | Hill | Female | Welsh |
| Bubba | | Unisex | Hebrew |
| Buck | He-goat | Male | English |
| Bud | Brother. Nickname Used Since Medieval Times. | Male | English |
| Buddy | Herald | Male | English |
| Bugsy | | Unisex | Hebrew |
| Bull | The adult male of certain large animals like cattle and elephants | Unisex | English |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bully | An overbearing person, a ruffian | Unisex | English |
| Busta | | Unisex | Hebrew |