Francis I, Duke of Brittany (d. 1450)
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, the daughter of King Charles VI of France.