 Agalbursa was the widow of Barisone II, and paternal aunt of Hugh himself.In 1192, a compromise was reached at Oristano whereby Peter di Serra, Barisone's eldest son by his first wife Pellegrina di Lacon, was recognised as co-"giudice".In 1195, William I of Cagliari invaded Arborea, imprisoning Peter and besieging Oristano, forcing Hugh to sign a pact ceding his territories and engaging him to marry Preziosa, William's daughter and a relative of the house of Peter.