| Name | Meaning | Gender | Origin |
|---|
| Blizzard | Violent snowstorm | Unisex | English |
| Blu | | Unisex | Hebrew |
| Blue | Blue | Unisex | English |
| Bobby | Bright fame | Unisex | Germanic |
| Boo | | Unisex | Hebrew |
| Booger | | Unisex | Hebrew |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boots | | Unisex | Hebrew |
| Bootsy | | Unisex | Hebrew |
| Borden | Boar pasture | Male | English |
| Bowie | Yellow | Male | Gaelic |
| Bradford | Broad ford | Male | English |
| Bradley | Broad wood | Male | English |
| Bramwell | Broom/gorse spring | Male | English |
| Branson | Sword | Male | Germanic |
| Brennan | Descendant of Braonán | Male | Gaelic |
| Brewster | Brewer of beer | Male | English |
| Brighton | Bright settlement | Male | English |
| Brodie | Muddy place | Male | Gaelic |
| Brody | Muddy place | Male | Gaelic |
| Bronson | Brown's son | Male | English |
| 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 |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | 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 |
| Buttons | | Unisex | Hebrew |
| Buzz | To move quickly and busily, to bustle | Male | English |