John Roland Seymour Phillips (born 1940) is a British historian and academic. He did a Doctor of Philosophy degree at the University of London in 1967, on the subject of the 14th-century Earl of Pembroke, Aymer de Valence.^[1] Later he published a book on the same subject. Phillips was head of the department of medieval history, at the University College Dublin.^[2] Today he is professor emeritus at that university.^[3] In 2010, Phillips contributed a volume on King Edward II to the Yale English Monarchs series.^{[citation needed]}