John VI, Count of Harcourt
John VI of Harcourt was a count of Harcourt. He was son of John V of Harcourt and Blanche of Ponthieu who was the sister of Jeanne of Ponthieu.
He succeeded to his father's counties of Aumale and Harcourt and barony of Elbeuf on his execution in 1356
In 1359 John married Catherine, daughter of Peter I, Duke of Bourbon. They had the following children:
- Charles
- Jean VII
- Louis, viscount of Châtellerault and lord of Aarschot in Mézières, archbishop of Rouen
- Blanche, abbess of Fontevraud
- Isabelle, in 1383 married Humbert VI of Thoire en Villars
- Jeanne, dame of Montaigle, in 1393 married William II of Namur
- Marie, in 1405 married Reinald IV, Duke of Guelders and Jülich and in 1426 married Rupert, son of Adolf, Duke of Jülich-Berg
- Catherine, nun
- Marguerite, dame of Longueville and of Plaines, married John II lord of Estouteville, mother of Guillaume d'Estouteville
- Jeanne, nun.