Yaakov ben Moshe Levi Moelin

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Rabbi Yaakov ben Moshe Levi Moelin
Grave of Yaakov ben Moshe Levi Moelin in Worms, Germany
Title	Maharil
Personal life
Born	c. 1360 Mainz
Died	September 14, 1427
Parent	Rabbi Moshe Levi Moelin
Religious life
Religion	Judaism

Yaakov ben Moshe Levi Moelin (Hebrew: יעקב בן משה מולין) (c. 1365 – September 14, 1427) was a Talmudist and posek (authority on Jewish law) best known for his codification of the customs (minhagim) of the German Jews. He is also known as Maharil (Hebrew: מהריל) - the Hebrew acronym for "Our Teacher, the Rabbi, Yaakov Levi" - as well as Mahari Segal or Mahari Moelin. Maharil's Minhagim was a source of law for Moses Isserles’ component of the Shulkhan Arukh.