| Babylas | | - | Late Greek, French (Rare) | |
| Bacchus | | BAK-əs (English) | Greek Mythology (Latinized) | |
| Baltasar (2) | | - | Biblical Greek | |
| Barak (1) | | BER-ək (English), BAR-ək (English) | Hebrew, Biblical, Biblical Greek, Biblical Hebrew | |
| Barnabas | | BAHR-nah-bahs (German), BAHR-nə-bəs (English) | German, English (Rare), Biblical, Biblical Latin, Biblical Greek | |
| Bartholomaios | | - | Biblical Greek | |
| Basemmath | | - | Biblical Greek | |
| Basileios | | - | Ancient Greek | |
| Basilius | | - | Ancient Greek (Latinized) | |
| Beniamin | | - | Romanian, Biblical Latin, Biblical Greek | |
| Berenice | | bər-NEES (English), ber-ə-NEE-see (English), be-re-NEE-che (Italian) | English, Italian, Ancient Greek (Latinized) | |
| Berenike | | - | Ancient Greek | |
| Bernike | | - | Biblical Greek | |
| Bessarion | | - | Late Greek | |
| Bethania | | - | Spanish, Biblical Latin, Biblical Greek | |