| R. Yehudah Gaon | Iraq | fl. 730 |
| R. Yehudah ben R. Shmuel Gaon | Iraq | fl. 906-917 |
| Gershom b[en] R[eb] Yehudah | France and German | b. 965 |
| R. Shlomo ben Yehudah | Israel | fl. 1025-1051 |
| back to 6th-11th c. |
| Yehudah | France | fl. 1007 |
| Mar Yuda b[en] R[eb] Avraham | Koln, Germany | 1096 |
| Mar Yehudah b[en] R[eb] Avraham heChasid | Koln, Germany | 1096 |
| Yehudah | Mainz, Germany | 1096 |
| Yehudah | Mainz, Germany | d. 1096 |
| R[eb] Yehudah b[en] R[eb] Yitzchak | Mainz, Germany | fl. 1096 |
| R[eb] Yehudah b[en] R[eb] Yitzchak haTayar haGadol | Germany | fl. 1096 |
| R[eb] Yehudah b[en] Rabbana Yitzchak | Mainz, Germany | 1096 |
| Rabbenu Menachem b[en] R[eb] Yehudah | Mainz, Germany | 1096 |
| Kalonymos bar Rabbi Yehudah | Mainz, Germany | fl. 1096 |
| Mar Yehudah b[en] R[eb] Avraham | | 1096 |
| R[eb] Yehudah haLevi ben Rabbenu Shmuel | | 1096 |
| Mar Yehudah | Koln, Germany | d. 1146 |
| R[eb] Yekusiel b[en] R[eb] Yehudah haCohen | Blois, France | d. 1171 |
| R[eb] Yehudah b[en] R[eb] Aharon = R[eb] Yuda b[en] R[eb] Aharon | Blois, France | d. 1171 |
| R[eb] Yitzchak b[en] R[eb] Yehudah | Blois, France | 1171 |
| R[eb] Yehudah b[en] R[eb] Menachem z"l | Boppard, Germany | d. 1180 |
| haRav R. Yehudah b[en] R[eb] Kalonymos | Mainz, Germany | 1188 |
| Ye[h]udah b[en] Rabbi Kalonymos | | fl. 1196 |
| R[eb] Yaakov b[en] haR[av] Yehudah miYelutra | Troyes, France | 1288 |
| back to Crusades |