 Dudo of Saint-Quentin, in describing the great deeds of the early Normans, calls Reginar I (who, along with a prince of the Frisians named Radbod, was an opponent of Rollo, the founder of Normandy) a Duke of both Hainaut and Hesbaye.Centuries later William of Jumièges, and then later still, Alberic de Trois Fontaines followed Dudo using the same titles when describing the same events.He was variously referred to as Duke, Count, Marquis, "missus dominicus", but historians doubt that these titles were connected to a particular territory.