| Name | Meaning | Gender | Origin |
|---|
| Baby | A young animal. An object or personal concern or indulgence | Unisex | |
| Bagheera | | Male | Hebrew |
| Bagpuss | | Unisex | Hebrew |
| Baird | minstrel | Male | Scottish |
| Bandit | An outlaw or robber | Male | Word |
| Banshee | Female fairy spirit from Irish Gaelic folklore. | Unisex | |
| Barnabas | so named for Barnabas Collins of Dark Shadows | Male | Aramaic |
| Barney | Comforter
| Male | English |
| Barry | spear thrower, son of Harry, Marksman | Male | Irish |
| Basil | Majestic, royal, brave | Male | Greek |
| Bast | Of The City Of Bubastis | Unisex | African |
| Beast | | Unisex | Hebrew |
| Benedict | Blessed | Male | English |
| Bertie | Brilliant, Illuminated Fame | Male | English |
| Blaze | Lisp: stutter. Blaise Pascal was a brilliant seventeenth century child prodigy: mathematician: scientist and philosopher who invented the calculating machine and hydraulic press before dying at age thirty-nine.
| Male | Latin |
| Blinky | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Boo Boo | | Unisex | Hebrew |
| Boss | An employer or supervisor | Unisex | |
| Brewster | brewer | Male | English |
| Buckbeak | | Unisex | |
| Buster | One that breaks up something | Male | Modern |