Charles, Duke of Brittany
French ruler
Charles of Blois-Châtillon, nicknamed "the Saint", was the legalist Duke of Brittany from 1341 until his death, via his marriage to Joan, Duchess of Brittany and Countess of Penthièvre, holding the title against the claims of John of Montfort. Wikipedia
Born: 1319, Blois, France
Died: September 29, 1364 (age 45 years), Auray, France
Great-grandparents: Philip III of France, Charles II of Naples, Guy, Count of Flanders, and more
Grandchildren: Olivier, Count of Penthièvre, Louis II of Anjou, Charles of Anjou, and more
Spouse: Joan, Duchess of Brittany (m. 1337)