Joanna of Dreux (in French Jeanne de Dreux, la Boiteuse) (1319-1384) was countess of Penthievre and nominal Duchess of Brittany during the Breton War of Succession. Joanna was the only daughter of Guy de Dreux, count of Penthievre, niece and heiress of duke John III de Dreux.
In 1337 married Charles of Blois in Paris and, in 1341 on the death of John III, the couple assumed their pretension to the duchy of Brittany. However, John of Dreux, born from the second marriage of duke Arthur II to Yolande de Montfort, did not agree of let go his own rights. The result was the Breton War of Succession, which would end in 1364 with the death of Charles of Blois in battle and the victory of the Montfort branch.
Joanna of Dreux (in French Jeanne de Dreux, la Boiteuse) (1319-1384) was countess of Penthievre and nominal Duchess of Brittany during the Breton War of Succession.
Joanna was the only daughter of Guy de Dreux, count of Penthievre, niece and heiress of duke John III de Dreux.
However, John of Dreux, born from the second marriage of duke Arthur II to Yolande de Montfort, did not agree of let go his own rights.
In the middle of the 14th century, Brittany was ruled by the House of Dreux.
Duke Arthur II of Dreux married twice, first to Mary of Limoges (1260-1291), then to Yolande of Dreux, countess of Montfort (1263-1322) and widow of king Alexander III of Scotland.
Joanna and Charles of Blois became dukes of Brittany.