Robert Guiscard
Roger was a Norman magnate and companion of Robert Guiscard, alongside whom he took part in the Norman conquest of southern Italy. In 1080/1081, however, as Robert Guiscard was preparing to cross the Adriatic and invade the Byzantine Empire, Roger defected to the Byzantines and informed their emperor, Alexios I Komnenos, of the Norman preparations. Roger's flight also forced his brother, Raoul, to seek refuge in the Byzantine court as well. He became the ancestor of the Raoul/Ralles family.