הרב יעקב קשטרו

Yaakov de Castro, alternative spelling: Yaakov Costaro and Jacob ben Abraham Castro (1525–1610), also known as Maharikash, was a rabbinic scholar, judge and exponent of Jewish law in Cairo, Egypt. A descendant of Jews who fled Portugal during the time of the Portuguese Inquisition, his family eventually came to settle in Egypt. A student of the illustrious Radbaz, he is considered the last Chief Rabbi of Egypt to hold sway over the entire Jewish community in Egypt, mostly Musta'arabi Jews, after the abolition of the office of nagid, and whose halachic rulings were widespread across the land.