William I, Count of Sancerre
Member of the House of Blois
William I of Sancerre was the second Count of Sancerre, Lord of Saint-Brisson and La Ferté-Loupière from 1191 until his death. He was the eldest son of Stephen I, Count of Sancerre. Wikipedia
Died: 1217
Children: Louis I de Sancerre
Grandchildren: Jean Ier de Sancerre and Isabeau de Sancerre
Great grandchildren: Étienne II de Sancerre, Jean II de Sancerre, and Blanche de Sancerre
Great-grandparents: Stephen, Count of Blois, Adela of Normandy, Engelbert, Duke of Carinthia, and more
Partner: Eustachie de Courtenay (1215–), Denise de Déols, and Marie de Charenton
Parents: Stephen I, Count of Sancerre