| Benedikt | | BE-ne-dikt (German), bye-nye-DEEKT (Russian), bee-nee-DEEKT (Russian) | German, Russian, Icelandic, Czech | |
| Berlin | | - | Various | |
| Bijou | | - | Various | |
| 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 | |
| Boleslav | | - | Czech, Russian, Medieval Slavic | |
| Boleslava | | - | Czech (Rare), Russian (Rare) | |
| 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 | |
| Borya | | - | Russian | |
| Braith | | BRAYTH | English (Australian) | |
| Bronislav | | brah-nee-SLAHF (Russian) | Czech, Slovak, Russian, Medieval Slavic | |
| Bronislava | | brah-nee-SLAH-vah (Russian) | Czech, Slovak, Russian | |