William of Savoy (died 1239 in Viterbo) was a bishop from the House of Savoy. He was a son of Thomas, Count of Savoy and Margaret of Geneva. He was elected bishop of Valence in 1224. He negotiated the weddings of queens, and was an advisor to Henry III of England. Between his religious roles and his family relations, his influence was noted from London to Rome. Career in Savoy Being at least the fourth son of a noble house, William's father Thomas sought for him positions in the church which would serve to strengthen the County of Savoy rather than diminish it. This included a request by 1220 to Henry III of England which led to William being responsible for the benefices of St Michael's on Wyre and Bingham. In 1220 he was also elected dean of the cathedral at Vienne, and in 1225 was elected bishop of Valence, replacing Gérold of Lausanne, who had just become patriarch of Jerusalem. His job as bishop included temporal authority as well as spiritual, but this was contested by Ademar de Peiteus, Count of Valentinois. With the assistance of his kinfolk, William was able to defeat the forces of Ademar and negotiated a favorable peace treaty in 1231.

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William of Savoy (died 1239 in Viterbo) was a bishop from the House of Savoy. He was a son of Thomas, Count of Savoy and Margaret of Geneva. He was elected bishop of Valence in 1224. He negotiated the weddings of queens, and was an advisor to Henry III of England. Between his religious roles and his family relations, his influence was noted from London to Rome.