| Abbreviation | Definition |
|---|---|
| Ramban | Nahmanides (1194–1270) |
| RamchalorRamhal | Moshe Chaim Luzzatto (17071746) |
| RamchalorRamhal | Moshe Chaim Luzzatto (1707–1746) |
| Rashba | Shlomo ben Aderet (12351310) |
| Rashba | Shlomo ben Aderet (1235–1310) |
| Rashbam | Samuel ben Meir (10851158) |
| Rashbam | Samuel ben Meir (1085–1158) |
| Rashbi | Simeon bar Yochai (1st century) |
| Rashi | Shlomo Yitzhaki (10401105) |
| Rashi | Shlomo Yitzhaki (1040–1105) |
| RCRB | Rabbis and Cantors Retirement Board |
| Re'em | Elijah Mizrachi (14551525) |
| Re'em | Elijah Mizrachi (1455–1525) |
| Rema | Moses Isserles (15201572) |
| Rema | Moses Isserles (1520–1572) |
| Riban | Judah ben Nathan (11th-12th centuries) |
| Rif | Isaac Alfasi (10131103) |
| Rif | Isaac Alfasi (1013–1103) |
| Ritva | Yom Tov Asevilli (12501330) |
| Ritva | Yom Tov Asevilli (1250–1330) |