Nethanel (al-)Fayyūmī(Nethanel ben al-Fayyūmī) (d. ca. 1165) was a scholar and philosopher who lived in Yemen, apparently in Sanʽa, where he served as head of the Jewish community. The attributive name (nisba) Fayyūmī indicates that his family might have originally come from Egypt. Some scholars (Adler and Kaufmann) identify him with Nethanel ben Moses ha-Levi, the gaon of Fustat, whereas others (Mann) with the son or, more plausibly, the father of Jacob ben Nethanel al-Fayyumi (Gottheil and Levine), to whom Maimonides wrote his famous Iggeret Teman (Epistle to Yemen). Nethanel …