Rebbe Rayatz

Yosef Yitzchak (Joseph Isaac) Schneersohn (Hebrew: יוסף יצחק שניאורסאהן; 21 June 1880 – 28 January 1950) was an Orthodox rabbi and the sixth Rebbe (spiritual leader) of the Chabad Lubavitch chasidic movement. He is also known as the Frierdiker Rebbe (Yiddish for "Previous Rebbe"), the Rebbe RaYYaTz, or the Rebbe Rayatz (an acronym for Rabbi Yosef Yitzchak). After many years of fighting to keep Orthodox Judaism alive from within the Soviet Union, he was forced to leave; he continued to conduct the struggle from Latvia, and then Poland, and eventually the United States, where he spent the last ten years of his life.