| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Bibiana | bee-BYAH-nah (Italian, Spanish) | Italian, Spanish, Late Roman | ||
| Blandina | - | Ancient Roman | ||
| Blandinus | - | Ancient Roman | ||
| Blandus | - | Ancient Roman | ||
| Blasius | - | Ancient Roman | ||
| 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 | ||
| Bonifatius | - | Late Roman | ||
| Bonitus | - | Late Roman | ||
| BrÂNduȘA | - | Romanian | ||
| Brutus | - | Ancient Roman | ||
| CĂTĂLin | - | Romanian | ||
| CĂTĂLina | - | Romanian | ||
| Caecilia | - | German, Ancient Roman | ||
| Caecilius | - | Ancient Roman |