| Name | Meaning | Gender | Origin |
|---|
| Blaze | Stuttering | Unisex | Latin |
| Blizzard | Violent snowstorm | Unisex | English |
| Blondie | Pale yellowish-brown | Unisex | French |
| Blu | | Unisex | Hebrew |
| Blue | Blue | Unisex | English |
| Blueberry | | Unisex | Hebrew |
| Bonnie | Pretty | Female | English |
| Bowen | Son of Owen | Male | Welsh |
| Bowie | Yellow | Male | Gaelic |
| Boyd | Yellow-gold | Male | Gaelic |
| Boyden | Messenger | Male | English |
| Brandy | Burning wine | Female | English |
| Brazil | Brave, Strong In Conflict | Male | Celtic |
| Brenna | Hill | Female | Welsh |
| Brick | Bridge. | Male | English |
| Brone | Sorrowful | Male | English |
| Bronson | Brown's son | Male | English |
| Bronwyn | White breast | Female | Welsh |
| Brown | Brown | Male | English |
| Brownie | Moist chocolate cake with nuts | Unisex | English |
| Bruno | Armour | Male | Germanic |
| Burne | Spring, stream | Male | English |
| Butter | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Butters | After the character in the South Park cartoons | Unisex | English |
| Butterscotch | | Unisex | Hebrew |
| Caesar | Long Hair | Male | Latin |
| Cale | Uncertain, perhaps slender | Male | Gaelic |
| Caltha | Yellow Flower | Female | Latin |
| Calypso | Conceal | Female | Greek |