| Bilyana | | - | Bulgarian | |
| Bisera | | - | Bulgarian, Macedonian | |
| Bistra | | - | Bulgarian, Macedonian | |
| Blaga | | - | Bulgarian | |
| Blagorodna | | - | Macedonian, Bulgarian | |
| Blagoy | | - | Bulgarian | |
| Blagun | | - | Bulgarian, Macedonian | |
| Blaguna | | - | Macedonian, Bulgarian | |
| Bogdan | | BAWG-dahn (Polish), BOG-dahn (Serbian, Croatian), bog-DAHN (Romanian) | Polish, Russian, Slovene, Bulgarian, Serbian, Croatian, Macedonian, Romanian, Medieval Slavic | |
| Bogdana | | bawg-DAH-nah (Polish) | Polish, Russian, Slovene, Bulgarian, Serbian, Macedonian, Romanian, Medieval Slavic | |
| Bogomil | | - | Bulgarian, Macedonian | |
| Bojidar | | - | Bulgarian | |
| Boris | | bah-REES (Russian), BO-ris (German), BAWR-is (English) | Bulgarian, Russian, Slovene, Croatian, Serbian, Macedonian, Georgian, German, History | |
| Borislav | | bah-ree-SLAHF (Russian) | Bulgarian, Serbian, Croatian, Slovene, Russian, Medieval Slavic | |
| Borislava | | bah-ree-SLAH-vah (Russian) | Bulgarian, Serbian, Russian | |