Yonasan Steif

Rabbi Yonasan Steif (Yiddish: יונתן שטייף‎; August 12, 1877 – August 25, 1958) was a senior dayan of Budapest, Hungary, before the Second World War, a man whom Rabbis Moshe Feinstein and Joel Teitelbaum referred to as the gadol hador (spiritual leader of the generation). He was a world-renowned posek and halachic authority.

He served as senior dayan together with Rabbi Israel Welcz. The Rosh Beth Din was Rabbi Efraim Fishel Zussman Sofer. While Rabbi Steif may have assumed the role of rosh beth din as the year 1944 approached, he was not such for most of his tenure.