Marie I de Coucy, Countess of Soissons

Marie I de Coucy
suo jure Dame de Coucy and d'Oisy suo jure Countess of Soissons
Spouse(s)	Henry of Bar, Marquis de Pont-à-Mousson
Issue Enguerrand of Bar Robert of Bar
Noble family	Coucy House of Plantagenet
Father	Enguerrand VII de Coucy
Mother	Isabella of England
Born	April 1366 Coucy Castle, Picardy, France
Died	After 3 March 1405 France

Marie I de Coucy, Dame de Coucy and d'Oisy, Countess of Soissons (April 1366 – after 3 March 1405) 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, on 18 February 1397, upon the death of her father, Enguerrand VII de Coucy. In addition to her titles, she also owned numerous estates in North-Eastern 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 (1367–1411), who married Robert de Vere, 9th Earl of Oxford, Marquess of Dublin, Duke of Ireland.

When Marie was about a month old, she accompanied her parents to England, where on 11 May 1366 her father received the title of Earl of Bedford and was inducted into the Order of the Garter. In 1376 at the age of ten, Marie joined the household of the French queen, Joanna of Bourbon and was educated alongside the Dauphin and his siblings.

In November 1384, she married Henry of Bar, Marquis de Pont-à-Mousson (1362 – October 1397 Treviso, Italy), son of Robert I, Duke of Bar and Marie of Valois, sister of King Charles V of France. The marriage produced two sons: