| Biljana | | - | Serbian, Macedonian, Croatian | |
| Biserka | | - | Croatian, Serbian | |
| Blagoje | | - | Serbian, Croatian | |
| BoŠKo | | - | Serbian, Croatian, Slovene | |
| BoŽA | | - | Serbian | |
| BoŽEna | | - | Czech, Slovak, Slovene, Croatian, Serbian | |
| BoŽIdar | | - | Serbian, Croatian, Slovene | |
| BoŽIdarka | | - | Serbian | |
| BoŽO | | BO-zho | Croatian, Serbian, Slovene | |
| Boban | | - | Serbian, Macedonian | |
| 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 | |
| Bojan | | BO-yahn (Serbian, Croatian, Macedonian) | Serbian, Croatian, Slovene, Macedonian | |
| Bojana | | - | Slovene, Macedonian, Serbian, Croatian | |
| Boris | | bah-REES (Russian), BO-ris (German), BAWR-is (English) | Bulgarian, Russian, Slovene, Croatian, Serbian, Macedonian, Georgian, German, History | |