John of Luxembourg, Lord of Beauvoir Count of Brienne (1370-1397) (1370–1397) Parents Mahaut de Châtillon Guy I of Luxembourg, Count of Ligny Children Lewis of Luxembourg Jeanne de Luxembourg John II of Luxembourg, Count of Ligny Peter I, Count of Saint-Pol Siblings Pierre de Luxembourg Waleran III of Luxembourg, Count of Ligny Joan, Countess of Ligny André de Luxembourg Marguerite de Luxembourg Partners Margaret of Brienne