John IV, Duke of Brittany
||This article may be expanded with text translated from the corresponding article in the French Wikipedia. (October 2012)|
|Citizens of Nantes paying homage to John IV|
|Duke of Brittany|
|Spouse||Joanna of Flanders|
|House||House of Dreux|
|Father||Arthur II, Duke of Brittany|
|Mother||Yolande de Dreux|
|Died||16 September 1345
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.
Marriage and issue
- John V, Duke of Brittany (1339–1399)
- Joan of Brittany, Baroness of Drayton (1341 – aft. 20 October 1399), married before 21 October 1385 Ralph Basset, 4th Baron Basset de Drayton
War of the Breton Succession
When his half-brother, John III, Duke of Brittany, died with no male heirs in 1341, John IV decided to contest the rights of his niece, Joan of Penthièvre, and her husband, Charles of Blois, to the Duchy of Brittany. This led to the War of the Breton Succession, which in turn became part of the Hundred Years' War. His patron in this quest was King Edward III of England.
|Ancestors of John IV, Duke of Brittany|
|Wikimedia Commons has media related to Jean de Montfort (1294-1345).|
- Jones, Michael, The Creation of Brittany, (The Hambledon Press, 1988), 210.
- Previté-Orton, Charles William, The Shorter Cambridge Medieval History, (Cambridge University Press, 1978), 877.
John IV, Duke of BrittanyBorn: 1295 Died: 1345
|Count of Montfort
|Duke of Brittany
with Joanna and Charles as rivals
|Peerage of England|
|Earl of Richmond
John of Gaunt
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