Mahaut de Châtillon countess of Saint-Pol (b. 1355) Parents Jeanne de Fiennes John, Count of Saint-Pol Children Marguerite de Luxembourg Waleran III of Luxembourg, Count of Ligny Pierre de Luxembourg John of Luxembourg, Lord of Beauvoir André de Luxembourg Joan, Countess of Ligny Siblings Guy V, Count of Saint-Pol Partners Guy I of Luxembourg, Count of Ligny