Marie of Brittany

Marie or Mary of Brittany may refer to:

Marie of Brittany, Countess of Saint-Pol, daughter of John II, Duke of Brittany and Beatrice of England; wife of Guy IV, Count of Saint-Pol
Marie of Brittany, daughter of Arthur II, Duke of Brittany and Yolande of Dreux; became a nun at Poissy
Marie of Brittany, Lady of La Guerche, daughter of John IV, Duke of Brittany and Joan of Navarre; wife of Jean I, Duke of Alençon
Marie of Brittany, daughter of Richard of Brittany and Marguerite d'Orléans; Abbess of Fontevraud Abbey
Marie of Brittany, Viscountess of Rohan, daughter of Francis I, Duke of Brittany and Isabella of Scotland; wife of John II, Viscount of Rohan