B. Adelaide (11), or Alix, Aug. 2, countess of Blois. 1243-1288. Daughter of John I., duke of Brittany. Married, 1254, to John de Chatillon, first count of Blois. She went to the Holy Land in 1287, and died on her return, Aug. 2, 1288. Her body was placed near that of her husband, in the abbey of la Guiche (which she had founded), near Blois. Collin de Plancy, Saintes et bienheureuses.