Marie de St Pol Foundress of Pembroke College, Cambridge (1303–1377) Parents Marie of Brittany, Countess of Saint-Pol Guy IV, Count of Saint-Pol Children Siblings Mahaut of Châtillon John, Count of Saint-Pol Isabeau de Châtillon Eléonore de Châtillon Béatrix de Châtillon Jeanne de Châtillon Partners Aymer de Valence, 2nd Earl of Pembroke