Francis I (in Breton Fransez I, in French François I) (Vannes/Gwened, May 14, 1414 – July 18, 1450, Château de l'Hermine/Kastell an Erminig), is Duke of Brittany, Count of Montfort and titular Earl of Richmond, from 1442 to his death.
He is the eldest son of Duke John V and Joan of France, the daughter of King Charles VI "the Mad" and his wife Isabeau of Bavaria.
