 On the next day his wife Constance, who had stayed back in Iesi, gave birth to his only son and heir Frederick II, the future emperor and king of Sicily and Jerusalem.The young William and his mother Sibylla had fled to Caltabellotta Castle; he officially renounced the Sicilian kingdom in turn for the County of Lecce and the Principality of Capua.A few days after Henry's coronation, however, the royal family and several Norman nobles were accused of a coup attempt and arrested.