| Name | Meaning | Gender | Origin |
|---|
| Budda | | 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 |
| Bugsy | | Unisex | Hebrew |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bullwinkle | | Unisex | Hebrew |
| Bully | An overbearing person, a ruffian | Unisex | English |
| Bumper | | Unisex | Hebrew |
| Bunky | | Unisex | Hebrew |
| Buster | One that breaks up something | Unisex | American English |
| Butch | Masculine in appearance or manner. | Unisex | American English |
| Butter | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Butterscotch | | Unisex | Hebrew |
| Buttons | | Unisex | Hebrew |
| Caesar | Long Hair | Male | Latin |
| Cali | Most beautiful | Female | English |
| Callie | Most beautiful | Female | Greek |
| Calvin | Bald | Male | French |
| Cameo | Delicate,carved relief | Unisex | English |
| Camille | Altar server | Female | Latin |
| Candy | Honest | Female | Latin |
| Capone | | Unisex | Hebrew |
| Captain | A captain | Unisex | English |
| Carley | Free man | Female | German |
| Casey | From Cayce | Male | American English |
| Cash | Cash | Unisex | English |
| Casper | Treasurer | Male | Persian |
| Cassie | She who entangles men | Female | Greek |
| Chad | Defense | Male | English |