Israel (ben Samuel?) ha-Dayyan ha-Maʿaravi (Israel ha-Dayyan al-Magrebi) was a Karaite scholar and poet who lived in Cairo and composed works in Arabic toward the end of the thirteenth century and the first half of the fourteenth. He is known to have served as a judge (dayyan) of the Karaite community in Egypt, and the Karaite chronicler Ibn al-Hītī calls him “the learned Israel, the judge” (ed. Nemoy, 1963). Apart from some liturgical poems (Heb. piyyuṭim ), several legal treatises and other works are also attributed to ha-Maʿaravi. The legal treatises were probably on…