Leo Jud (1482 - June 19, 1542), known to his contemporaries as Meister Leu, Swiss reformer, was born in Alsace.

He was educated at Basel, where after a course in medicine he turned to the study of theology. This change was due to the influence of Zwingli whose colleague at Zürich Jud became after serving for four years (1518-1522) as pastor of Einsiedeln.

His chief activity was as a translator; he was the leading spirit in the translation of the Zürich Bible and also made a Latin version of the Old Testament.

See Life by C Pestalozzi (1860); art, in Herzog-Hauck's Realencyklopädie, vol. ix. (1901).