Final answer:
John Knox is the Scottish Calvinist clergyman who led the Reformation in Scotland and founded the Presbyterian Church, influenced by the teachings of John Calvin.
Step-by-step explanation:
The devout Scottish Calvinist clergyman who spent years in exile before returning to lead the Reformation in his country and founded the Presbyterian Church is John Knox. He was a significant figure during the time of Elizabeth I and was a staunch opponent of Mary, Queen of Scots. John Knox's work was deeply influenced by John Calvin, under whose guidance Geneva became a central hub for Protestant reformation.
Calvinism is known for its doctrines of predestination and the belief that salvation cannot be achieved through 'good works' as per Catholic teachings, instead emphasizing that salvation is preordained by God. Knox's efforts to reform the Church of Scotland were instrumental in spreading Calvinist principles, leading to the establishment of Presbyterianism in Scotland.