John Duns Scotus (1265-1308)
From Encyclopedia of World Religions
Scottish Franciscan theologian and philosopher, also known as Blessed John Duns Scotus; Johannes Duns Scotus. Duns Scotus was the foremost Franciscan metaphysician, philosopher, and theologian of the Middle Ages. He lectured at Oxford, Paris, and Cologne, where his remains are venerated. His celebrated argument for the existence of God is called On God as the First Principle. Known as the Subtle Doctor or the Marian Doctor, he had many followers and influenced theologians of the Protestant Reformation centuries later. Somewhat ironically, his name became the source for the epithet “dunce.” He was beatified by John Paul II in 1994.