| Name | Meaning | Gender | Origin |
|---|
| Blaze | Lisp: stutter. Blaise Pascal was a brilliant seventeenth century child prodigy: mathematician: scientist and philosopher who invented the calculating machine and hydraulic press before dying at age thirty-nine.
| Male | Latin |
| Blizzard | Violent snowstorm | Male | |
| Blooper | | Unisex | Hebrew |
| Bolt | | Unisex | Hebrew |
| Bongo | Connected drums played by beating with hands. | Unisex | |
| Bonzo | | Male | Hebrew |
| Booger | | Unisex | Hebrew |
| Boogie | | Unisex | Hebrew |
| Boomerang | | Male | Hebrew |
| Brandi | Brandy | Unisex | English |
| Broderick | son of Roderick, from the broad ridge | Male | Norse |
| Bronco | A wild horse | Male | Spanish |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Buck | A fleet footed youth. Male deer. | Male | English |
| Buckaroo | | Unisex | Hebrew |
| Bug | An insect. A disease-producing microorganism. An error in coding or logic that causes a malfunction in a computer a program. An electronic listening device. An enthusiasm. Slang for annoy. | Unisex | |
| Bugs | | Unisex | Hebrew |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Male | |
| Bumblebee | | Unisex | |
| Bungee | | Male | |
| Buster | One that breaks up something | Male | Modern |
| Buzz | To move quickly and busily, to bustle | Male | Modern |
| Calamity | | Male | Hebrew |
| Calamity Jane | | Unisex | Hebrew |