| Berta | | BER-tah (Polish, German, Italian) | Polish, Czech, Hungarian, German, Spanish, Catalan, Italian, Slovene | |
| BlaŽEj | | - | Czech, Slovak | |
| Blanka | | BLAHN-kah (Czech, Slovak, Polish, Croatian), BLAWN-kaw (Hungarian) | Czech, Slovak, Polish, Hungarian, Croatian | |
| BoŘIvoj | | - | Czech | |
| BoŽEna | | - | Czech, Slovak, Slovene, Croatian, Serbian | |
| Bohdan | | boh-DAHN (Ukrainian) | Czech, Ukrainian | |
| BohumÍR | | - | Czech, Slovak | |
| Bohumil | | - | Czech, Slovak | |
| Bohumila | | - | Czech | |
| Bohuslav | | bo-hoo-SLAHV (Ukrainian) | Czech, Slovak, Ukrainian | |
| Bohuslava | | bo-hoo-SLAH-vah (Ukrainian) | Czech, Ukrainian | |
| Boleslav | | - | Czech, Russian, Medieval Slavic | |
| Boleslava | | - | Czech (Rare), Russian (Rare) | |
| BonifÁC | | - | Czech, Hungarian | |
| Branislav | | - | Serbian, Slovak, Czech, Slovene, Croatian, Macedonian | |