R. Judah b. Jacob ibn Attar, (known as "Rabbi al-Kabbir" (the great teacher); 1655–1733), was born in Fez and at a young age he was appointed head of the Moroccan dayyanim, after refusing to accept any remuneration for this function. He earned his living in trade and devoted his life to the well being of his coreligionists. In collaboration with his disciple, R. Jacob Abensur, he published the takkanot of the first Spanish exiles in Fez and drew up new regulations that continued to serve as the basis of Judeo-Moroccan jurisprudence. His published works include Minhat Yehudah on the Pentateuch; customs and practices of Fez regarding terefot published in Mekor Hayyim (1897). Many responsa were published in Mishpat u-Zedakah le-Ya'akov (pt. 1–1894, pt. 2–1903) and others appear in works of various Moroccan rabbis. Many of his writings still exist in manuscript including a commentary on Midrash Rabbah. The Chidah devotes a lenghty description to him, where he describes him as a holy man whose name invokes miracles even after his demise.

לשון החיד"א במערכת גדולים (55 א) ...ושמעתי מרב אחד הי"ו שהוא סלת נקיה. והרב ז"ל היה מלומד בניסים וכמה נפלאות אזני תשמענה שאירעו לו הן בעודנו חי וגם אחר פטירתו הן למתפלל על מצבתו הן לנשבע בשם הרב ז"ל וכיוצא דברים נפלאים...