| Boleslav | | - | Czech, Russian, Medieval Slavic | |
| Boleslava | | - | Czech (Rare), Russian (Rare) | |
| Bonaventure | | bawn-ə-VEN-chər (English) | History | |
| Bongani | | - | Southern African, Zulu | |
| Boniface | | BAWN-ə-fays (English), BAWN-ə-fəs (English) | French, English (Rare) | |
| Bonifacio | | bo-nee-FAH-cho (Italian), bo-nee-FAH-thyo (Spanish), bo-nee-FAH-syo (Latin American Spanish) | Italian, Spanish, Portuguese | |
| Bonifacy | | baw-nee-FAH-tsi | Polish | |
| Bonita | | bə-NEE-tə | English | |
| Bonnie | | BAHN-ee | English | |
| Booker | | BUWK-ər | English | |
| Bor | | - | Slovene | |
| Bora (1) | | - | Turkish | |
| Boran | | - | Turkish | |
| Borghild | | - | Norwegian, Norse Mythology | |
| Borghildr | | - | Ancient Scandinavian, Norse Mythology | |