 In 615, Concordia was captured, and around 625 the brothers were killed in an ambush at the Byzantine city of Oderzo by the patrician Gregorius..The Ducal throne was then assumed by Grasulf II, brother of Gisulf II (and thus Tasso and Kakko's uncle).However Gisulf's other brothers, Romuald and Grimoald refused to accept Grasulf's superiority and relocated to the court of Arechis in the Duchy of Benevento.