Chabad significant person Rabbi Shmuel Schneersohn
Rabbi Shneur Zalman of Liadi (1745–1812), founded the Chabad movement in the town of Liozna. He later moved the movement's center to the town of Liadi. Rabbi Shneur Zalman was the youngest disciple of Dov Ber of Mezeritch, the principal disciple and successor of Rabbi Israel Baal Shem Tov, founder of Hasidism. The Chabad movement began as a separate school of thought within the Hasidic movement, focusing of the spread of Hasidic mystical teachings using logical reasoning (creating a kind of Jewish "rational-mysticism"). Shneur Zalman's main work is the Tanya (or Sefer Shel Beinonim, "Book of the Average Man"). The Tanya is the central book of Chabad thought and is studied daily by followers of the Chabad movement. Shneur Zalman's other works include a collection of writings on Hasidic thought, and the Shulchan Aruch HaRav, a revised version of the code of Halakha, both of which are studied regularly by followers of Chabad. Shneur Zalman's successors went by last names such as "Schneuri" and "Schneersohn" (later "Schneerson"), signifying their descent from the movement's founder. He is commonly referred to as the "Old Rebbe" (Yiddish: אַלטער רבי Alter Rebbe or Hebrew: אדמו״ר הזקן Admur Hazoken).
Rabbi Dovber Schneuri (1773–1827), son of Rabbi Shneur Zalman, led the Chabad movement in the town of Lyubavichi (Lubavitch). His leadership was initially disputed by Rabbi Aaron Halevi of Stroselye, however, Rabbi Dovber was generally recognized as his father's rightful successor, and the movement's leader. Rabbi Dovber published a number of his writings on Hasidic thought, greatly expanding his father's work. He also published some of his father's writings. Many of Rabbi Dovber's works have been subsequently republished by the Chabad movement. He is commonly referred to as the Mitteler Rebbe (Yiddish: מיטעלער רבי "Middle Rabbi", Hebrew: אדמו״ר האמצעי Admur Ha'emtzoei).
Rabbi Menachem Mendel Schneersohn (1789–1866), a grandson of Rabbi Shneur Zalman and son-in-law of Rabbi Dovber. Following his attempt to persuade the Chabad movement to accept his brother-in-law or uncle as rebbe, Rabbi Menachem Mendel assumed the title of rebbe of Chabad, also leading the movement from the town of Lyubavichi (Lubavitch). He published a number of his works on both Hasidic thought and Jewish law. Rabbi Menachem Mendel also published some of the works of his grandfather, Rabbi Shneur Zalman. He is commonly referred to as the Tzemach Tzedek after the title of his responsa.
Rabbi Shmuel Schneersohn (1834–1882), was the seventh and youngest son of Rabbi Menachem Mendel. He assumed the title of rebbe in town of Lyubavichi (Lubavitch), while several of his brothers assumed the title of rebbe in other towns, forming Chabad groups of their own which existed for several decades. Years after his death, his teachings were published by the Chabad movement. He is commonly referred to as the Maharash, an acronym for Moreinu HaRav Shmuel ("our teacher, Rabbi Shmuel").
Rabbi Shalom Dovber Schneersohn (1860–1920), Shmuel's second son, succeeded his father as rebbe. Rabbi Shalom Dovber waited some time before officially accepting the title of rebbe, as not to offend his elder brother, Zalman Aaron. He established a yeshiva called Tomchei Temimim. During World War I, he moved to Rostov-on-Don. Many of his writings were published after his death, and are studied regularly in Chabad yeshivas. He is commonly referred to as the Rashab, an acronym for Rabbi Shalom Ber.
Rabbi Yosef Yitzchak Schneersohn (1880–1950), the only son of Sholom Dovber, succeeded his father as rebbe of Chabad. Rabbi Yosef Yitzchak was exiled from Russia, following an attempt by the Bolshevik government to have him executed. He led the movement from Warsaw, Poland, until the start of World War II. After fleeing the Nazis, Rabbi Yosef Yitzchak lived in Brooklyn, New York until his death. He established much of Chabad's current organizational structure, founding several of its central organizations as well as other Chabad institutions, both local and international. He published a number of his writings, as well as the works of his predecessors. He is commonly referred to as the Rayatz or the Frierdiker Rebbe ("Previous Rebbe").
Rabbi Menachem Mendel Schneerson (1902–1994), son-in-law of Rabbi Yosef Yitzchak, and a great-grandson of the third Rebbe of Lubavitch, assumed the title of rebbe one year after his father-in-law's death. Rabbi Menachem Mendel greatly expanded Chabad's global network, establishing hundreds of new Chabad centers across the globe. He published many of his own works as well as the works of his predecessors. His teachings are studied regularly by followers of Chabad. He is commonly referred to as "the Lubavitcher Rebbe", or simply "the Rebbe". Even after his death, many continue to revere him as the leader of the Chabad movement.