| Boadicea | | - | Ancient Celtic (Latinized) | |
| Bob | | BAHB (English), BAWB (Dutch) | English, Dutch | |
| Bobbi | | BAH-bee | English | |
| Bobbie | | BAH-bee | English | |
| Bobby | | BAH-bee | English | |
| 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 | |
| Boghos | | - | Armenian | |
| Bogomir | | - | Slovene | |
| Bojan | | BO-yahn (Serbian, Croatian, Macedonian) | Serbian, Croatian, Slovene, Macedonian | |
| Bojana | | - | Slovene, Macedonian, Serbian, Croatian | |
| Boniface | | BAWN-ə-fays (English), BAWN-ə-fəs (English) | French, English (Rare) | |
| Bonita | | bə-NEE-tə | English | |
| Bonnie | | BAHN-ee | English | |
| Booker | | BUWK-ər | English | |