They both played a vital role in the initiation of the Protestant Reformation during the XVI century. Both men shown a considerable discontent with the norms and ideas which ruled the church back then, and both released a series of papers and works which led people to question the teachings of the church and incited them to base their religious beliefs only in their own faith.
They both were part of reformation
They were both religious.
John Calvin and Martin Luther a priest from Germany
martin luther
John Calvin
No
Martin Luther
Martin Luther, a 16th-century German monk, is a famous Protestant leader known for sparking the Protestant Reformation by challenging the Catholic Church's teachings and practices. His "95 Theses" criticized the sale of indulgences and emphasized faith as the key to salvation, leading to the establishment of the Lutheran denomination and inspiring others to break away from the Catholic Church.
martin luther, john calvin,john knox,
Martin Luther, John Calvin, and several others are recognized as the founder of the Protestant reformation. But it's mainly Martin Luther.
Martin Luther chiefly, but others include John Calvin and Huldrych Zwingli
John Calvin
John Calvin and Martin Luther (not jr.)