Rabbi Gershon Shaul Yom-Tov Lipmann ben Nathan ha-Levi Heller (c. 1579 – 19 August 1654), was a Bohemian rabbi and Talmudist, best known for writing a commentary on the Mishnah called the Tosefet Yom-Tov (1614–1617). Heller was one of the major Talmudic scholars in Prague and in Poland during the "Golden Age" before 1648. Source: Wikipedia (en)