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Marie of Brittany, Countess of Saint-Pol

French noblewoman
The basics
AKA Marie de Dreux
Date of birth
Date of death 1339
Mother: Beatrice of England
Father: John II Duke of Brittany
Spouse: Guy IV Count of Saint-Pol
Children: Mahaut of Châtillon Marie de St Pol John Count of Saint-Pol
The details

Marie of Brittany (1268–1339) was the daughter of John II, Duke of Brittany, and Beatrice of England. She is also known as Marie de Dreux.


Her maternal grandparents were Henry III of England and Eleanor of Provence, Henry was a son of King John of England. John was son of Henry II of England and his wife Eleanor of Aquitaine.

Her sister was Blanche of Brittany, wife to Philip of Artois and mother of Margaret of Artois, Robert III of Artois and Joan of Artois, Countess of Foix. Margaret was mother of Jeanne d'Évreux, Queen of France.


She married Guy IV, Count of Saint-Pol, in 1292, their children were as follows:

  • John of Châtillon (d. 1344), Count of Saint Pol
  • James of Châtillon (d.s.p. 1365), Lord of Ancre
  • Mahaut of Châtillon (1293–1358), married Charles of Valois
  • Beatrix of Châtillon, married in 1315 Jean de Dampierre, Lord of Crèvecœur
  • Isabeau of Châtillon (d. May 19, 1360), married in May 1311 Guillaume I de Coucy, Lord of Coucy
  • Marie of Châtillon, married Aymer de Valence, 2nd Earl of Pembroke
  • Eleanor of Châtillon, married Jean III Malet, Lord of Granville
  • Joan of Châtillon, married Miles de Noyers, Lord of Maisy


Through her daughter Mahaut, Marie was the maternal grandmother of Marie of Valois, Isabella of Valois, who became Duchess of Bourbon and was the mother of Louis II, Duke of Bourbon, and Joanna of Bourbon, who became Queen of France. Mahaut's other daughter was Blanche of Valois, who married Holy Roman Emperor Charles IV and was the mother of Katharine of Bohemia.


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