Catherine d’Artois (1296-1368) (1296–1368) Parents Philippe d'Artois Blanche of Brittany Children Joan of Ponthieu, Dame of Epernon Blanche of Ponthieu Siblings Joan of Artois, Countess of Foix Margaret of Artois Marie of Artois Robert III of Artois Isabelle d'Artois Partners John II, Count of Aumale