| BÁRbara | | - | Portuguese, Spanish | |
| Balbina | | bahl-BEE-nah (Italian) | Spanish (Rare), Portuguese (Rare), Italian (Rare), Ancient Roman | |
| Balbino | | - | Spanish (Rare), Portuguese (Rare), Italian (Rare) | |
| Baldo | | - | Italian, Spanish, Ancient Germanic | |
| Baldomero | | bahl-do-ME-ro | Spanish | |
| Balduino | | - | Spanish | |
| Baltasar (1) | | bahl-tah-SAHR | Spanish | |
| BartolomÉ | | bahr-to-lo-ME | Spanish | |
| Basilio | | bah-ZEE-lyo (Italian), bah-SEE-lyo (Spanish) | Italian, Spanish | |
| Baudelio | | - | Spanish | |
| Bautista | | bow-TEES-tah | Spanish | |
| Beatriz | | be-ah-TREETH (Spanish), be-ah-TREES (Latin American Spanish), be-a-TREES (Portuguese), be-a-TREESH (Portuguese) | Spanish, Portuguese | |
| BelÉN | | be-LEN | Spanish | |
| Benigna | | - | Spanish, Italian, Portuguese, Late Roman | |
| Benigno | | - | Italian, Spanish, Portuguese | |