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John I ((ブルトン語:Yann), (フランス語:Jean); c. 1217/18 – 8 October 1286), known as John the Red due to the colour of his beard, was Duke of Brittany from 1237 to his death and 2nd Earl of Richmond in 1268. John was the eldest of three children born to Duchess Alix and her husband and ''jure uxoris'' co-ruler, Duke Peter I. He became duke upon his mother's death in 1221. His father, who had reigned as duke due to his marriage to Alix, ruled as regent until John reached adulthood. He experienced a number of conflicts with the Bishop of Nantes and the Breton clergy. In 1240, he issued an edict expelling Jews from the duchy and cancelling all debts to them. He joined Louis IX of France in the Eighth Crusade in 1270, and survived the plague that killed the king. The duchy of Brittany experienced a century of peace, beginning with John I and ending with Duke John III's reign in 1341. ==Marriage and issue== In 1236 John married Infanta Blanche, daughter of King Theobald I of Navarre. They had the following surviving issue: *John II, Duke of Brittany (1239 – 1305), married Beatrice of England and had issue *Peter of Brittany (1241 – 1268), Lord of Dinan, Hade, Léon, Hennebont and La Roche-Derrien *Alix of Brittany, Dame de Pontarcy (1243 - 1288), married John of Châtillon, Count of Blois *Theobald (1245–1256), interred in the church abbey of Saint-Gildas-de-Rhuys *Theobald (died soon after birth), interred in the church abbey of Saint-Gildas-de-Rhuys *Eleanor (1248), died young, interred in the church abbey of Saint-Gildas-de-Rhuys *Nicolas of Brittany (1249–1261), interred in the church abbey of Saint-Gildas-de-Rhuys *Robert (1251–1259), interred in the church abbey of Saint-Gildas-de-Rhuys 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「John I, Duke of Brittany」の詳細全文を読む スポンサード リンク
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