Hebrew name: מהרש״א
Years: 1555–1631
Primary city: Krakow, Ukraine
Rabbi Shmuel Eidels authored the Chiddushei Halachos and Chiddushei Aggados, foundational works on the Talmud known for their analytical clarity. He adopted his mother-in-law's name, Eidel, in recognition of her financial support for his yeshiva, where he established a method of study emphasizing a comprehensive understanding of the entire Gemara.