| Name | Meaning | Gender | Origin |
|---|
| Bootsie | Collins Pussycat | Unisex | |
| 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 |
| Buffy | God's promise | Female | 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 | |
| Bunny | little rabbit | Female | Nickname |
| Buster | One that breaks up something | Male | Modern |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Female | |
| Butters | after the character in the South Park cartoons | Unisex | |
| Button | | Unisex | Hebrew |
| Cadbury | Brand of chocolate | Unisex | |
| Cali | Most beautiful
| Female | English |
| Calli | California | Unisex | |
| Callie | Lark
| Female | Greek |
| Cally | Lark | Unisex | English |
| Calypso | Greek for concealor. A type of music originating in the West Indies. Also a satellite of Saturn. | Male | Greek |
| Candy | Confectionery made with sugar. | Female | English |