Ibn Yashūsh, Isaac (Abū Ibrāhīm) Ibn Qasṭār
(463 words)

Born in Toledo around 982, Abū Ibrāhīm Isaac ibn Yashūsh died in the same city in 1056. He was a court physician in the service of ʿAlī ibn Mujāhid and his son Iqbāl al-Dawla, governors of the Denia taifa on the eastern coast of al-Andalus.  Ibn Abī Uṣaybiʿa, in his biographical compendium on physicians, Ṭabaqātal-Aṭibbāʾ, praised Ibn Yashūsh as a person of acute intelligence and genteel manners, well versed in grammar, philosophy, the Hebrew Bible, and Jewish law, and in addition a confirmed bachelor. Moses ibn Ezra thought it appropriate to name him alongside Ibn Janāḥ as a master of th…

Cite this page
José Martínez Delgado, “Ibn Yashūsh, Isaac (Abū Ibrāhīm) Ibn Qasṭār”, in: Encyclopedia of Jews in the Islamic World, Executive Editor Norman A. Stillman. Consulted online on 18 October 2018
First published online: 2010

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