| Bojan | | BO-yahn (Serbian, Croatian, Macedonian) | Serbian, Croatian, Slovene, Macedonian | |
| Bojana | | - | Slovene, Macedonian, Serbian, Croatian | |
| BolÍVar | | - | Spanish (Latin American) | |
| Bolanle | | - | Western African, Yoruba | |
| Boleslav | | - | Czech, Russian, Medieval Slavic | |
| Boleslava | | - | Czech (Rare), Russian (Rare) | |
| Bongani | | - | Southern African, Zulu | |
| BonifÁC | | - | Czech, Hungarian | |
| Bonifaas | | - | Dutch | |
| Boniface | | BAWN-ə-fays (English), BAWN-ə-fəs (English) | French, English (Rare) | |
| Boos | | - | Biblical Greek | |
| Booz | | - | Biblical Latin | |
| Borghildr | | - | Ancient Scandinavian, Norse Mythology | |
| Borghildur | | - | Icelandic | |
| Boris | | bah-REES (Russian), BO-ris (German), BAWR-is (English) | Bulgarian, Russian, Slovene, Croatian, Serbian, Macedonian, Georgian, German, History | |