Jeanne de Penthièvre (d. 1384) Jeanne de Penthièvre (1319 - 1384), countess of Penthièvre, daughter of Guy de Dreux, count of Penthièvre. She was the duchess of Brittany together with her consort Charles de Blois between 1341 - 1364, and therefore one of the main protagonists in the Breton war of succession. Occurrences: Click here to find all occurrences of this name. |