Blanche of Courtenay 1200 - (b. 1200) Parents Robert of Courtenay, Lord of Champignelles Children Isabeau de Sancerre Siblings Philip de Courtenay, Seigneur de Champignelles Raoul of Courtenay Robert de Courtenay Peter of Courtenay, Lord of Conches Isabeau de Courtenay-Champignelles Jean Ier de Courtenay-Champignelles William of Courtenay Partners Louis I de Sancerre