Moses Zarzal (fl. 1400) was a converso Spanish Jewish writer and physician to Henry III of Castile.[1] He was the dedicatee of Profiat Duran's Hebrew almanac The girdle of the Ephod (1395).[2] Poems in Castillian were attributed to him, including one for the birth of Henry's son, later John II of Castile, though his authorship is not certain.[3]