Hillel the Elder
Even Israeli rabbis of Babylonian Jewish descent such as Hillel the Elder whose parents were Aramaic-speaking Jewish migrants from Babylonia (hence the nickname "Ha-Bavli"), had to learn Greek language and Greek philosophy in order to be conversant with sophisticated rabbinical language – many of the theological innovations introduced by Hillel had Greek names, most famously the Talmudic notion of Prozbul, from Koine Greek προσβολή, "to deliver":