Canon, John (Lat. Casnoticus), (sometimes called Marbres), an English Franciscan.monk of the 14th century, studied some time at Oxford, from which he removed to Paris. He there became a pupil of Duns Scotus, whom he always imitated. He afterwards returned to Oxford, and there taught theology until his death, about 1340. He was particularly learned in the Aristotelian philosophy, and in civil and canon law. His published works are, In Aristotelis Physica Lib. viii (1481), and some other treatises. See Chalmers, Biog. Diet. s.v.; Allibone, Dict. of Brit. and Amer. Authors, s.v.