 This section needs translation into English.In an act dated 15 September 1096, "Uvilielmus marchio filius quondam Uvilielmi et Ota iugalis eius filia quondam Tebaldi et Uvilielmus filius presicti Uvilielmi et Ote, et Oto filius item Otonis, seu Petrus filius Roberti, atque coniunx eius Ermengarda filia predicti Tebaldi et Tezo filius iamdicti Petri et Ermengarde" conceded their rights over the church of Santo Stefano di Allein.By his second marriage with Otta di Aglié, William was the father of his successor Rainier.