| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Blaise | BLEZ | French | ||
| Blanchard | - | Ancient Germanic | ||
| Blanche | BLAWNSH (French), BLANCH (English) | French, English | ||
| Blandina | - | Ancient Roman | ||
| Blandine | - | French | ||
| Blandinus | - | Ancient Roman | ||
| Blandus | - | Ancient Roman | ||
| Blanka | BLAHN-kah (Czech, Slovak, Polish, Croatian), BLAWN-kaw (Hungarian) | Czech, Slovak, Polish, Hungarian, Croatian | ||
| Blasius | - | Ancient Roman | ||
| Blazh | - | Medieval Slavic | ||
| Blazhe | - | Macedonian | ||
| Blejan | - | Cornish | ||
| Bo (2) | - | Chinese | ||
| BoŘIvoj | - | Czech | ||
| BoŠKo | - | Serbian, Croatian, Slovene |