John Wycliffe (c. 1320s–1384) is called the "Morning Star of the Reformation" because his ideas and actions anticipated many of the core beliefs of the Protestant Reformation, which occurred over a century later.
Why the title?
He criticized the corruption of the Catholic Church.
Advocated for the authority of the Bible over the Church.
Translated the Bible into English (from Latin), making it accessible to common people.
Inspired future reformers like Jan Hus and eventually Martin Luther.