Tags: Noble.
Mary Countess of Blois also known as Marie of Avesnes (1200–1241) was countess of Blois from 1230 to 1241.She was the daughter of Walter of Avesnes and Margaret of Blois.In 1226 Mary married Hugh I of Châtillon a count from Châtillon-sur-Marne son of Gaucher III of Châtillon and Elisabeth of Saint Pol.