Dovber of Mezeritch
Dovber of Mezeritch d.1772 was the primary disciple of Israel ben Eliezer , the Baal Shem Tov , the founder of Hasidic Judaism of Orthodox Judaism .
Known as the Maggid ( "The Voice" ) to Hasidic Jews, since he "voiced" the words of his master and spread the word of Hasidism over Eastern Europe .
His teachings are quoted in the volume "Maggid Devarav L'Yaakov." His students included Rabbi Elimelekh of Lizhensk[?], Rabbi Zusha of Anipoli[?], Rabbi Yosef Yitzchak[?] of Berdichev, Rabbi Shneur Zalman of Liadi and many other prominent Jewish leaders.