| Name | Meaning | Gender | Origin |
|---|
| Bo | Handsome | Female | French |
| Bob | Bright fame | Male | Germanic |
| Bobby | Bright fame | Unisex | Germanic |
| Bonnie | Pretty | Female | English |
| Booger | | Unisex | Hebrew |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boone | Good | Male | French |
| Bowie | Yellow | Male | Gaelic |
| Brandy | Burning wine | Female | English |
| Bruno | Armour | Male | Germanic |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Bubba | | Unisex | Hebrew |
| Buck | He-goat | Male | English |
| Buckwheat | | Unisex | Hebrew |
| Buddy | Herald | Male | English |
| 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 | English |
| Bull | The adult male of certain large animals like cattle and elephants | Unisex | English |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Buster | One that breaks up something | Unisex | American English |
| Cali | Most beautiful | Female | English |
| Callie | Most beautiful | Female | Greek |
| Candy | Honest | Female | Latin |
| Cannon | Canon | Male | English |
| Cash | Cash | Unisex | English |
| Casper | Treasurer | Male | Persian |
| Cassie | She who entangles men | Female | Greek |
| Cat | Catlike | Unisex | English |
| Chaos | Gaping void | Unisex | Greek |
| Charlie | Free man | Unisex | Germanic |
| Chelsea | Chalk landing place | Female | English |