John of Jandun[1] (born between 1280 and 1290 in Jandun, modern-day Signy-l'Abbaye, France; died between 1 September 1328 and 15 September 1328 in Montalto, modern-day Italy) was an Averroist philosopher, theologian, and political writer. He was born at Jandun in the Ardennes, in what is now France. He was a leading interpreter of Aristotle and philosopher at Paris, and has traditionally been cited as co-author with Marsilius of Padua of Defensor Pacis. It is now doubted by most scholars, for example by Quentin Skinner, whether he did indeed write the first part of that treatise (on internal evidence, with Skinner interpreting the content in relation to Italian politics outside the Parisian's experience).
According to the Catholic Encyclopedia[2], which calls him John of Janduno, he was born about the year 1300, graduated in arts at the Collège de Navarre in Paris, and wrote a work entitled "De Laudibus Parisiis."[3] It also considers him as distinct from John of Gand. Confusion is also possible with Jean de Gand, the French name of John of Gaunt.
This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed (1913). "John of Janduno". Catholic Encyclopedia. Robert Appleton Company.