This article offers some initial findings concerning the triangular relationship between three Ilkhanid intellectuals: the convert and vizier Rashīd al-Dīn, the Muslim polymath al-Shīrāzī, and the Jewish philosopher Ibn Kammūnah. By exploring these links, it also sheds light on one of the least studied aspects of Rashīd al-Dīn’s engagement with his Jewish heritage: his Muslim polemics against Judaism and the Jews. In this way, the article seeks to contribute to understanding the place of Jews and Judaism at the Ilkhanid court.