Francis I, Duke of Brittany

Francis I (in Breton Fransez I, in French François I) (11 May 1414, Vannes – 17 July 1450, Château de l'Hermine, Vannes), was Duke of Brittany, Count of Montfort and titular Earl of Richmond, from 1442 to his death. He was the son of John V, Duke of Brittany and Joan of France.

Francis I
Duke of Brittany; Count of Montfort
Reign29 August 1442 – 17 July 1450
PredecessorJohn V
SuccessorPeter II
Born11 May 1414
Died17 July 1450(1450-07-17) (aged 36)
Château de l'Hermine, Vannes.
SpouseYolande of Anjou
Isabella of Scotland
IssueRenaud, Count of Montfort
Margaret, Duchess of Brittany
Marie, Viscountess of Rohan
FatherJohn V, Duke of Brittany
MotherJoan of France
ReligionRoman Catholicism


Francis I's first marriage was to Yolande of Anjou, daughter of Louis II, Duke of Anjou and Yolande of Aragon; they were married at Nantes in 1431. Francis and Yolande had a son, Renaud, Count of Montfort. His son Renaud died young and his wife Yolande died in 1440.

His second marriage was to Isabel of Scotland (daughter of James I, King of Scots and Joan Beaufort); he married Isabel at the Château d'Auray on 30 October 1442. Francis and Isabel had two daughters:


Francis I died on 17 July 1450 at the Château de l'Hermine, being only 36 years of age. Because he had no surviving male heirs at the time of his death, he was succeeded as Duke of Brittany by his younger brother, Peter II of Brittany.

During his time, the residences of the Dukes of Brittany consisted of: the Château de l'Hermine; the Château de Nantes; the Château de Clisson; and the Château de Suscinio.


See also

Francis I, Duke of Brittany
Regnal titles
Preceded by
John V
Duke of Brittany
Count of Montfort

Succeeded by
Peter II
Peerage of England
Preceded by
John V
Earl of Richmond
Succeeded by
Peter II
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