Judah ben Samuel of Regensburg (1150 - 22 February 1217), also called Yehuda HeHasid or Judah the Pious in Hebrew, was a leader of the Ashkenazi Hasidim a movement of Jewish mysticism in Germany (not to be confused with the 18th-century Hasidic Judaism founded by the Baal Shem Tov).

Judah was born in 1150 in the small town of Speyer,