John Wycliffe (also spelled Wyclif, Wickliffe, Wicklyf etc.; c. 1328 – 31 December 1384) was an English scholastic philosopher, Christian reformer, Catholic priest, and a theology professor at the University of Oxford. Wycliffe is traditionally believed to have advocated for or made a vernacular translation of the Vulgate Bible into Middle English, though more recent scholarship has minimised the extent of his advocacy or involvement for lack of direct contemporary evidence.
He became an influential dissident within the Catholic priesthood during the 14th century and his ideas are often considered an important predecessor to Protestantism.