| Name | Meaning | Gender | Origin |
|---|
| Brick | Bridge. | Male | English |
| Broderick | Reddish-brown | Male | Welsh |
| Brodie | Muddy place | Male | Gaelic |
| Bronson | Brown's son | Male | English |
| Brook | A brook, stream | Female | English |
| Brooks | A brook, stream | Male | English |
| Brown | Brown | Male | English |
| Bubba | | Unisex | Hebrew |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | English |
| Buck | He-goat | Male | English |
| Buckwheat | | Unisex | Hebrew |
| Buddha | | Unisex | Hebrew |
| Buddy | Herald | Male | English |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bumper | | Unisex | Hebrew |
| Bunny | Little rabbit | Female | English |
| Burrito | A flour tortilla wrapped around a filing of beef, beans or cheese | Unisex | English |
| Butt | | Unisex | Hebrew |
| Butter | | Unisex | Hebrew |
| Butterbean | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Butterscotch | | Unisex | Hebrew |
| Buttons | | Unisex | Hebrew |
| Buzz | To move quickly and busily, to bustle | Male | English |
| Cadbury | Brand of chocolate | Unisex | English |
| Cade | Round, lumpy | Male | English |
| Cadence | Rhythm | Female | English |
| Caesar | Long Hair | Male | Latin |
| Cairo | Victorious one | Unisex | Arabic |
| Calamity | | Unisex | Hebrew |