| Blagun | | - | Bulgarian, Macedonian | |
| Blaguna | | - | Macedonian, Bulgarian | |
| Blazhe | | - | Macedonian | |
| 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 | |
| Bogomil | | - | Bulgarian, Macedonian | |
| 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 | |
| Borko | | - | Croatian, Serbian, Macedonian | |
| Bozhidar | | - | Bulgarian, Macedonian, Medieval Slavic | |
| Branislav | | - | Serbian, Slovak, Czech, Slovene, Croatian, Macedonian | |
| Branko | | - | Serbian, Croatian, Slovene, Slovak, Macedonian | |
| Chedomir | | - | Macedonian, Medieval Slavic | |