| Name | Meaning | Gender | Origin |
|---|
| Blackberry | Prickly shrub with small edible berries | Unisex | English |
| Blaze | Stuttering | Unisex | Latin |
| Blondie | Pale yellowish-brown | Unisex | French |
| Blue | Blue | Unisex | English |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Bows | | Unisex | Hebrew |
| Brady | Descendant of Brádach | Unisex | Gaelic |
| Brody | Muddy place | Male | Gaelic |
| Brownie | Moist chocolate cake with nuts | Unisex | English |
| Bruno | Armour | Male | Germanic |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Bubba | | Unisex | Hebrew |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | English |
| Buck | He-goat | Male | English |
| Buddy | Herald | Male | English |
| Buster | One that breaks up something | Unisex | American English |
| Butch | Masculine in appearance or manner. | Unisex | American English |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Buttons | | Unisex | Hebrew |
| Buzz | To move quickly and busily, to bustle | Male | English |
| Byron | At the cattle sheds | Male | English |
| Casey | From Cayce | Male | American English |
| Cash | Cash | Unisex | English |
| Chad | Defense | Male | English |
| Chance | Good fortune | Male | English |
| Charlie | Free man | Unisex | Germanic |
| Chase | Huntsman | Male | English |
| Chester | Camp | Male | Latin |
| Chico | Boy | Male | Spanish |
| Chip | Free man | Male | German |