David Norman Dumville (born 5 May 1949) is a British medievalist and Celtic scholar. He was educated at Emmanuel College and the Department of Anglo-Saxon, Norse and Celtic, University of Cambridge; Ludwig-Maximilians-Universität München; and received his PhD at the University of Edinburgh in 1976, presenting the thesis "The textual history of the Welsh-Latin Historia Brittonum". He is professor emeritus of Celtic & Anglo-Saxon at the University of Aberdeen. He has previously taught or held posts at Swansea University (Fellow, 1975–1977), the University of Pennsylvania (assistant professor of English, 1977–1978), the University of Cambridge, (lecturer in Anglo-Saxon, Norse and Celtic, 1977–1991; reader in early Mediaeval history and culture of British Isles, 1991–1995; professor of palaeog