Timothy Alan Reuter (25 January 1947 – 14 October 2002), grandson of the former mayor of Berlin Ernst Reuter, was a German-British historian who specialized in the study of medieval Germany, particularly the social, military and ecclesiastical institutions of the Ottonian and Salian periods (10th–12th centuries). In 1994, Reuter was appointed to a professorship at the University of Southampton, where he remained until his death in 2002. At Southampton, he headed a number of educational and research initiatives that promoted medieval history and scholarship.