Moshe Schneersohn (also, Moshe Zalmonovitch or Moshe Shneuri, later Leon Yulievitz) (born c. 1784 - died before 1853) was the youngest son of the founder of Chabad-LubavitchHasidism, Rabbi Shneur Zalman of Liadi. He was a close student of his father, and acted in a Rabbinic position in Ule, Belarus. According to some scholars he converted to Christianity and died in a St. Petersburg asylum. Other scholars point to the Church's investigation into the alleged conversion, and conclude that the conversion was staged, and the documents, forged.[1]
The year of Moshe Schneersohn's birth is not clear. It is known that he married in 1797, and since all of his brothers married at 14 years of age, scholars assume that he was born around 1784. The sixth Lubavitcher Rebbe in his historical notes on the Chabad movement notes that he was born in 1784 in Liozna, but elsewhere writes that he was born in 1779.[2]
In his early life, his father engaged tutors to teach him Torah, as well as secular subjects. He also taught Moshe himself.
It is alleged that when he was eight years old he started showing signs of mental infirmity. He received medical treatment, and from the scant information available, it appears that his illness alternated between remission and outbreak during his childhood. In 1801, his father took him for treatment with doctors in Vitebsk, St. Petersburg and Smolensk.[3]
He married Shifra daughter of Rabbi Tzvi Hirsh of Ule, a town near Liadi. He went to live with his father-in-law in Ule and was soon appointed to the post of Rabbi in that town.[4]
Moshe had an excellent memory, and while in Ule he authored a number of transcripts of Maamarim that he had heard from his father (as well as notations). Some of his transcripts are printed in Torah Or and Likutei Torah. Additionally, he wrote interpretations in Kabbalah and addressed Halachic queries to his famous nephew, Menachem Mendel Schneersohn.[1][5]
He also signed with his brothers on the introductions to his father's Shulchan Aruch and the 1814 edition of the Tanya.
During Napoleon's invasion of Russia in 1812, his family fled from Liadi to the Russian interior. His father died as a result of the journey. Moshe did not go with them, instead traveling to Shklov. He was captured by the French Army and sentenced to death for espionage, but he was pardoned. According to a letter written by his mother in 1817, he had been stable prior to this incident, but apparently this event took a toll on his mental health.[1][6]
Alleged conversion
Chabad and other scholars differ on Moshe's conversion and later life.
According to some scholars, after the alleged conversion he changed his name to Leon Yulievitch. He returned to visit Lubavitch, but fled, ultimately dying in a mental institution in St. Petersburg.[7]
His conversion and apostasy have been denied by the Chabad movement consistently since his death.[7]
The Chabad biography, authored by the sixth Rebbe, Rabbi Yosef Yitzchok Schneersohn, recounts that Moshe and his brother, the second Rebbe of Chabad, Dovber Schneuri were introduced to the Czar by the governor of Mogilev. Rabbi Moshe's tone towards the governor after the meeting offended the Archbishop of Smolensk who was present. They started discussing matters of religion and Moshe was challenged to a debate. Moshe reluctantly accepted the challenge, and won the debate. Furious, the Christians arrested Moshe, and imprisoned him in a church in Kiev. Moshe managed to escape from the church, and he traveled around Europe incognito on a self imposed "exile" until his death in 1878. Moshe's escape took place on the night of the 19th of Kislev, 5576/1815 [exactly 27 years after his father's miraculous liberation].[8] The documentation of his conversion post date this incident by several years.[7]
Contemporary Chabad sources repeat the story of the attempted forced conversion.[9]
References
123Matusov, Eliyahu (2014). עין תחת עין[An eye for an eye]. pp.171 ff. ISBN1495102521. Retrieved November 30, 2025.
↑Assaf, David (2010). "End Notes". Untold Tales of the Hasidim: Crisis & Discontent in the History of Hasidism. University Press of New England. pp.247–248, note 27. ISBN9781584658610. Moshe's date of birth is extrapolated from the date of his marriage... More problematic are the dates of birth and death suggested by the sixth Habad rebbe, Yosef Yitshak Schneersohn (Rayyats), who sets Moshe's birth in 1784 and his death in 1878 (Igrot kodesh: Moharayyats, 7:16). It appears unlikely that Moshe lived to the age of ninety-four, spending nearly seventy years in absolute anonymity. More confusing is yet another, earlier date of birth supplied elsewhere by Yosef Yitshak Schneersohn in his grandfather Shmuel Schneersohn's name: Tammuz 1779 (Sefer hasihot, 5704, 150; Sefer hatoladot: Moharash, 134; Sefer hatoladot: Moharashab, 13; see also Hillman, Igrot ba'al haTanya, 213, no. 119), making Moshe's life span nearly ninety-nine years! Yet another version penned by Rayyats places Moshe's date of birth as Adar 1780 (Divrei hayamim hahem, 91; see the notes in Sefer hatoladot: Moharash [New York, 1997], 106).
↑Assaf, David (January 2012). "Moshe, Son of Rabbi Shneur Zalman of Lyady". Untold Tales of the Hasidim: Crisis & Discontent in the History of Hasidism. University Press of New England. p.35. ISBN9781584658610. According to the archival sources discussed below, the first signs of Moshe's mental illness emerged when he was eight years old. He received medical treatment, and from the scant information available, it appears that his illness alternated between remission and outbreak during his childhood. The documentation also indicates that, in 1801, his father Shneur Zalman made the rounds of Vitebsk, St. Petersburg,30 and Smolensk in search of a cure for Moshe.
↑Assaf, David (January 2012). "Moshe, Son of Rabbi Shneur Zalman of Lyady". Untold Tales of the Hasidim: Crisis & Discontent in the History of Hasidism. University Press of New England. pp.35–36. ISBN9781584658610. Moshe married Shifra,33 the daughter of Zvi Hirsh of Ule, a town in Vitebsk Province, not far from Lyady and Vitebsk... At a later date, Moshe apparently received an appointment as a communal rabbi.35
↑Assaf, David (January 2012). "Moshe, Son of Rabbi Shneur Zalman of Lyady". Untold Tales of the Hasidim: Crisis & Discontent in the History of Hasidism. University Press of New England. p.36. ISBN9781584658610. Habad sources report... that, because of his excellent memory, Moshe was honored with the task of repeating his father's talks for hasidim who had not been present when they were originally delivered: "During our rebbe's lifetime . . . goldentongued Moshe would repeat our rebbe's hasidic talks in their entirety exactly as delivered, and would also record them in their entirety (and we saw a large book with all these writings and notations)."36 Some of these notations, known as hanakhot, have been preserved in Moshe's own handwriting.37 Aside from these notations, no other Torah exposition, thought, or letters by Moshe are known to be extant.38
↑Assaf, David (January 2012). "Moshe, Son of Rabbi Shneur Zalman of Lyady". Untold Tales of the Hasidim: Crisis & Discontent in the History of Hasidism. University Press of New England. pp.36–39. ISBN9781584658610. But Moshe and his family did not take part in this perilous journey and evidently remained in Ule, or nearby... Moshe did attempt, albeit unsuccessfully, to flee east (without his family) in order to join his father and brothers. He made it to Shklov, where he was taken prisoner by the French army and accused of spying. Interrogated and sentenced to death, Moshe was released when his captors realized that the supposed spy was emotionally unbalanced... Sometime before 1817 Moshe experienced another physical crisis that was undoubtedly emotional as well. His recovery was noted in a letter dated Nisan 1817 from his mother44
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