Eleazar ben Judah ben Kalonymos, also known as Eleazar of Worms or Eleazar Rokeach, was a major Talmud scholar, mystic, and the last major member of the Hasidei Ashkenaz. He was a prolific author, providing most of the movement's extant pietistic and ethical literature. He also wrote Tosafot to many Talmudic tractates, which were referred to by Bezalel Ashkenazi in his Shiṭṭah Meḳubbeẓet.