John V of Brittany
Duke of Brittany, Count of Montfort (1389-1442)
John V, sometimes numbered as VI, (24 December 1389 – 29 August 1442) bynamed John the Wise (Breton: Yann ar Fur ; French: Jean le Sage), was Duke of Brittany and Count of Montfort from 1399 to his death. His rule coincided with the height of the Hundred Years' War between England and France. John's reversals in that conflict, as well as in other internal struggles in France, served to strengthen his duchy and to maintain its independence.
His alternative regnal name, John VI, as he is known traditionally in old English sources, comes from English partisan accounting as to who was the rightful duke of Brittany during the War of the Breton Succession (1341–1365), which had preceded the rule of his father. Although he faced problems which had lingered from it, his rule as duke was mostly unchallenged. Without significant internal and foreign threats, John V reinforced ducal authority, reformed the military, constructed a coherent method of taxation, and established diplomatic and trade contacts with most of Western Europe.
John V was also a patron of the arts and the Church, and funded the construction of several cathedrals. He is known for creating the "Lycée Lesage" in Vannes.
Life
John V was born on 24 December 1389 at the Château de l'Hermine as the eldest son of John IV, Duke of Brittany, and Princess Joan of Navarre. He became Duke of Brittany in 1399 when he was still a minor upon the death of his father.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jun 15, 2026. The linked authority identifier is Q454013. VIAF identifies the subject as 261939597. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1389, 1442, 1399 and 1341.
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