| BoŽIdar | | - | Serbian, Croatian, Slovene | |
| BoŽIdarka | | - | Serbian | |
| BoŽO | | BO-zho | Croatian, Serbian, Slovene | |
| Boadicea | | - | Ancient Celtic (Latinized) | |
| Boban | | - | Serbian, Macedonian | |
| Bodil | | - | Swedish, Norwegian, Danish | |
| 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 | |
| BoglÁRka | | - | Hungarian | |
| Bogomil | | - | Bulgarian, Macedonian | |
| Bohdan | | boh-DAHN (Ukrainian) | Czech, Ukrainian | |
| Bohuslav | | bo-hoo-SLAHV (Ukrainian) | Czech, Slovak, Ukrainian | |
| Bohuslava | | bo-hoo-SLAH-vah (Ukrainian) | Czech, Ukrainian | |
| Boipelo | | - | Southern African, Tswana | |