| Name | Meaning | Gender | Origin |
|---|
| Blizzard | Violent snowstorm | Unisex | English |
| Blue | Blue | Unisex | English |
| Bogart | Orchard | Male | German |
| Bogey | | Unisex | Hebrew |
| Bojangles | | Unisex | Hebrew |
| Bolt | | Unisex | Hebrew |
| Bongo | Connected drums played by beating with hands. | Unisex | English |
| Boo | | Unisex | Hebrew |
| Booger | | Unisex | Hebrew |
| Booker | A bleacher of cloth | Male | English |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boone | Good | Male | French |
| Bootsy | | Unisex | Hebrew |
| Boston | Botolph's town | Unisex | English |
| Bradley | Broad wood | Male | English |
| Brady | Descendant of Brádach | Unisex | Gaelic |
| Branson | Sword | Male | Germanic |
| Bronson | Brown's son | Male | 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 |
| Bubba | | Unisex | Hebrew |
| Buck | He-goat | Male | English |
| Buddy | Herald | Male | English |
| Bugsy | | Unisex | Hebrew |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bumper | | Unisex | Hebrew |
| Buster | One that breaks up something | Unisex | American English |
| Buzz | To move quickly and busily, to bustle | Male | English |