| Bettino | | bet-TEE-no | Italian | |
| Biaggio | | - | Italian (Rare) | |
| Biagino | | - | Italian | |
| Biagio | | - | Italian | |
| Bianca | | BYAHN-kah (Romanian) | Italian, Romanian | |
| Bibiana | | bee-BYAH-nah (Italian, Spanish) | Italian, Spanish, Late Roman | |
| Bice | | BEE-che | Italian | |
| Bonaccorso | | - | Italian | |
| Bonaventura | | bo-nah-ven-TOO-rah | Italian | |
| Bonifacio | | bo-nee-FAH-cho (Italian), bo-nee-FAH-thyo (Spanish), bo-nee-FAH-syo (Latin American Spanish) | Italian, Spanish, Portuguese | |
| Brigida | | - | Italian, Spanish | |
| Bruna | | - | Italian, Portuguese, Croatian | |
| Brunella | | - | Italian | |
| Brunilda | | broo-NEEL-dah (Spanish) | Spanish, Italian, Portuguese | |
| Bruno | | BROO-no (German), BRUW-naw (Polish) | German, Italian, Spanish, Portuguese, French, Croatian, Polish, Ancient Germanic | |