Marie I de Coucy, Countess of Soissons

Marie I de Coucy was Dame de Coucy and d'Oisy, and Countess of Soissons from 1397. She succeeded suo jure to the title of Countess of Soissons upon the death of her father, Enguerrand VII de Coucy, on 18 February 1397. In addition to her titles, she also possessed numerous estates in northeastern France. She was the wife of Henry of Bar, and the granddaughter of King Edward III of England and Philippa of Hainault.