Marie I de Coucy, Countess of Soissons

Marie I de Coucy, Dame de Coucy and dOisy, Countess of Soissons was the wife of Henry of Bar, and the granddaughter of King Edward III of England and Philippa of Hainault. She succeeded to the title of suo jure Countess of Soissons, onFebruary 1397, upon the death of her father, Enguerrand VII de Coucy. In addition to her titles, she also owned numerous estates in NorthEastern France. Mary, Queen of Scots, King Henry IV of France, and the Bourbon kings of France were her direct descendants.

Marie was born in April 1366 at Coucy Castle, Picardy, France. She was the eldest daughter of a powerful French nobleman, Enguerrand VII de Coucy, and Isabella of England, daughter of King Edward III of England and Philippa of Hainault. She had a younger sister, Philippa de Coucy , who married Robert de Vere, 9th Earl of Oxford, Marquess of Dublin, Duke of Ireland.

Source: Wikipedia