| Name | Meaning | Gender | Origin |
|---|
| Bongo | Connected drums played by beating with hands. | Unisex | English |
| Booger | | Unisex | Hebrew |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boots | | Unisex | Hebrew |
| Boozer | Excessive alcoholic drinker | Unisex | English |
| Boris | Battle, fight | Male | Slavonic |
| Boston | Botolph's town | Unisex | English |
| Brie | The exalted one | Female | Gaelic |
| 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 |
| Buck | He-goat | Male | English |
| Buckley | Ram's clearing | Male | English |
| Buddy | Herald | Male | English |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bullwinkle | | Unisex | Hebrew |
| Bumper | | Unisex | Hebrew |
| Burrito | A flour tortilla wrapped around a filing of beef, beans or cheese | Unisex | English |
| Buster | One that breaks up something | Unisex | American English |
| Buzz | To move quickly and busily, to bustle | Male | English |
| Cadbury | Brand of chocolate | Unisex | English |
| Calamity | | Unisex | Hebrew |
| Calvin | Bald | Male | French |
| Calypso | Conceal | Female | Greek |
| Cato | Acute | Male | Latin |
| Cha-cha | | Unisex | Hebrew |
| Chance | Good fortune | Male | English |
| Chaos | Gaping void | Unisex | Greek |
| Charlotte | Free man | Female | Germanic |
| Chewy | Needing chewing. | Unisex | English |