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.
Yissachar Dov Rokeach is the son of Rabbi Mordechai of Bilgoray and comes from a long line of Rebbes such as Rabbi Yissachar Dov Rokeach.
The part that may or may not be correct or incorrect is his coming from a long line of Rebbes. He has a couple of relatives who had the job, but it doesn't say how far back it goes.