| Name | Meaning | Gender | Origin |
|---|
| Brenda | fiery hill, sword-blade | Female | Celtic |
| Bruno | Brown
| Male | |
| Bruno | Brown
| Male | |
| Brutus | heavy, dull | Male | Latin |
| Bubble | | Unisex | Hebrew |
| Buck | A fleet footed youth. Male deer. | Male | English |
| Bucky | | Unisex | Hebrew |
| Bucky Katt | | Unisex | Hebrew |
| Buford | | Unisex | Hebrew |
| 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 | |
| Bully | An overbearing person, a ruffian | Unisex | |
| Bunny | little rabbit | Female | Nickname |
| Buster | One that breaks up something | Male | Modern |
| Butch | Masculine in appearance or manner. | Male | Nickname |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Female | |
| Buttons | | Male | Hebrew |
| Buzz | To move quickly and busily, to bustle | Male | Modern |
| Buzzy | | Unisex | Hebrew |
| Cactus | Cactus | Unisex | English |
| Caesar | Title for Roman Emperors | Male | Latin |
| Calico | Multi-colored.
| Female | English |
| Calliope | beautiful voice | Female | Greek |
| Calvin | Bald | Male | Latin |
| Calypso | Greek for concealor. A type of music originating in the West Indies. Also a satellite of Saturn. | Male | Greek |
| Cameo | A carved gem portrait.
| Female | Word |