William II (died 1226),count of Perche andbishop of Châlons, son of CountRotrou IV of Perche and Matilda,^[1] daughter of CountTheobald II of Champagne andMatilda of Carinthia.

William began his career as treasurer and provost of the Church of St. Martin of Tours, and was elected bishop of Chalons in 1215,^[1] consecrated in 1216. The following year he became count of Perche upon the death of his nephew Thomas in theBattle of Lincoln.^[2] As count-bishop, William was a valuable advisor to the kings of France and was listed among those by Pope Honorious III to participate in theAlbigensian Crusade.^[3] His death in February 1226 left the question of the succession to theCounty of Perche unresolved for years.^[4][5] He left money to his cousin CountessIsabelle of Chartres for the "support of the poor".^[6]

• Berman, Constance Hoffman (2018).The White Nuns: Cistercian Abbeys for Women in Medieval France. University of Pennsylvania Press.
• Fassler, Margot Elsbeth (2010).The Virgin of Chartres: Making History Through Liturgy and the Arts. Yale University Press.
• Thompson, Kathleen (2002).Power and Border Lordship in Medieval France: The County of the Perche, 1000-1226. The Boydell Press.

• 1226 deaths
• Counts of Perche