A Short Biographical Dictionary of English Literature/Duns, Scotus Johannes
Duns, Scotus Johannes (1265?-1308?). Schoolman. The dates of his birth and death and the place of his birth are alike doubtful. He may have been at Oxf., is said to have been a regent or prof. at Paris, and was a Franciscan. He was a man of extraordinary learning, and received the sobriquet of Doctor Subtilis. Among his many works on logic and theology are a philosophic grammar, and a work on metaphysics, De Rerum Principio (of the beginning of things). His great opponent was Thomas Aquinas, and schoolmen of the day were divided into Scotists and Thomists, or realists and nominalists.