Francis I, Duke of Brittany

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Francis I
Miniature of Francis from the Hours of Isabella Stewart, 15th century
Duke of Brittany Count of Montfort
Reign	29 August 1442 – 17 July 1450
Predecessor	John V
Successor	Peter II
Born	11 May 1414 Vannes
Died	17 July 1450(1450-07-17) (aged 36) Château de l'Hermine, Vannes.
Burial	Redon Abbey
Spouses	Yolande of Anjou ​ ​ (m. 1431; died 1440)​ Isabella of Scotland ​ ​ (m. 1442)​
Issue	Renaud, Count of Montfort Margaret, Duchess of Brittany Marie, Viscountess of Rohan
House	Montfort
Father	John V, Duke of Brittany
Mother	Joan of France

Francis I (in Breton Fransez I, in French François I) (11 May 1414 – 17 July 1450), was Duke of Brittany, Count of Montfort and titular Earl of Richmond, from 29 August 1442 to his death. He was born in Vannes, the son of John V, Duke of Brittany and Joan of France,^[1] the daughter of King Charles VI of France.