John I, Count of Penthièvre

John I (5 February 1345 – 16 January 1404), was Count of Penthièvre and Viscount of Limoges from 1364 to 1404, and the Penthièvre claimant to the Duchy of Brittany. == Biography == John was born in Jurgon-les-Lacs in Brittany while his parents, Joan of Penthièvre and Charles of Blois, ruled over the duchy of Brittany.

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