Person:John IV, Duke of Brittany (1)

Jean IV , duc de Bretagne
b.1295
Facts and Events
Name Jean IV , duc de Bretagne
Alt Name Jean IV de Monfort
Gender Male
Birth[1] 1295
Death[1] 16 Sep 1345 Hennebont, Morbihan, Bretagne, France
Other? House of Dreux


the text in this section is copied from an article in Wikipedia

John of Montfort (in Breton Yann Moñforzh, in French Jean de Montfort) (1295 – 16 September 1345, Château d'Hennebont), was John IV, Duke of Brittany, and 6th Earl of Richmond from 1341 to his death. He was the son of Arthur II, Duke of Brittany and his second wife, Yolande de Dreux. He contested the inheritance of the Duchy of Brittany by his niece, Joan of Penthièvre, which led to the War of the Breton Succession, which in turn evolved into being part of the Hundred Years' War between England and France. John's patron in his quest was King Edward III of England. He died in 1345, 19 years before the end of the war, and the victory of his son John V over Joan of Penthièvre and her husband, Charles of Blois.

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References
  1. 1.0 1.1 John IV, Duke of Brittany, in Wikipedia: The Free Encyclopedia.
  2.   JEAN de Bretagne, in Cawley, Charles. Medieval Lands: A prosopography of medieval European noble and royal families.