Yolande of Aragon
a throne claimant and titular queen regnant of Aragon, titular queen consort of Naples, Duchess of Anjou, Countess of Provence, and regent of Provence during the minority of her son.
She was a daughter of John I of Aragon and his wife Yolande of Bar. Yolande played a crucial role in the struggles between France and England, influencing events such as the financing of Joan of Arc's army in 1429 and tipping the balance in favour of the French. She was also known as Jolantha de Aragon and Violant d'Aragó. Tradition holds that she commissioned the famous Rohan Hours