| Name | Meaning | Gender | Origin |
|---|
| Boris | A fighter, battler | Male | Slavic |
| Boy | A male child | Unisex | |
| Bruiser | A large heavyset man | Unisex | |
| Bubba | | Male | Hebrew |
| Bubba | | Male | Hebrew |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Bud | herald, to puff up, friend | Male | English |
| Buddy | From Budd - The welcome messenger. | Male | English |
| Buddy | From Budd - The welcome messenger. | 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 | |
| Buster | One that breaks up something | Male | Modern |
| Butters | after the character in the South Park cartoons | Unisex | |
| Button | | Unisex | Hebrew |
| Cadbury | Brand of chocolate | Unisex | |
| Calli | California | Unisex | |
| Cally | Lark | Unisex | English |
| Calypso | Greek for concealor. A type of music originating in the West Indies. Also a satellite of Saturn. | Male | Greek |
| Casey | brave, watchful | Male | Irish |
| Casper | Master of the treasure | Male | Dutch |
| Castor | pious one | Male | Greek |
| Chance | French for luck | Male | |
| Chaos | Kay-oss | Male | |
| Charlemagne | | Unisex | Hebrew |
| Charlie | a man: variant of Carl.
| Male | English |