William III, Count of Ponthieu
William III of Ponthieu also called William Talvas. He was seigneur de Montgomery in Normandy and Count of Ponthieu. Wikipedia
Born: 1093
Died: 1172 (age 79 years)
Great grandchildren: William IV, Count of Ponthieu, Ela of Salisbury, 3rd Countess of Salisbury, Adela de Warenne, and more
Children: Guy II of Ponthieu, John I, Count of Alençon, Clemence de Ponthieu, and more
Spouse: Helie of Burgundy (m. 1115–1141)
Great-grandparents: William I Talvas, Roger de Montgomery, seigneur of Montgomery, and Hugh II, Count of Ponthieu