| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Blasius | - | Ancient Roman | ||
| Blazh | - | Medieval Slavic | ||
| Blazhe | - | Macedonian | ||
| Blejan | - | Cornish | ||
| Bo (2) | - | Chinese | ||
| BoŘIvoj | - | Czech | ||
| BoŠKo | - | Serbian, Croatian, Slovene | ||
| BoŽEna | - | Czech, Slovak, Slovene, Croatian, Serbian | ||
| BoŽIca | - | Croatian | ||
| BoŽIdar | - | Serbian, Croatian, Slovene | ||
| BoŽO | BO-zho | Croatian, Serbian, Slovene | ||
| Boadicea | - | Ancient Celtic (Latinized) | ||
| Boaz | BO-az (English) | Biblical, Hebrew, Biblical Hebrew | ||
| Bob | BAHB (English), BAWB (Dutch) | English, Dutch | ||
| Boban | - | Serbian, Macedonian |