Premise: Yissachar Dov Rokeach (born 19 January 1948) is the fifth and present Rebbe of the Hasidic dynasty of Belz. He is the son of Rabbi Mordechai of Bilgoray (1902 – 1949), the grandson of the third Belzer Rebbe, Rabbi Yissachar Dov Rokeach, and the nephew of the fourth Belzer Rebbe, Rabbi Aharon Rokeach, who raised him. He has led Belz since 1966.
Hypothesis: Yissachar Dov Rokeach whole family consists of Rabbi.