Jeanne de Bar, Countess of Marle and Soissons

Jeanne de Bar, suo jure Countess of Marle and Soissons, Dame d'Oisy, Viscountess of Meaux, and Countess of Saint-Pol, of Brienne, de Ligny, and Conversano (1415 - 14 May 1462) was a noble French heiress and Sovereign Countess. She was the only child of Robert of Bar, Count of Marle and Soissons, Sire d'Oisy, who was killed at the Battle of Agincourt when she was a baby, leaving her the sole heiress to his titles and estates. In 1430, at the age of fifteen, Jeanne was one of the three women placed in charge of Joan of Arc when the latter was a prisoner in the castle of John II of Luxembourg, Count of Ligny, Jeanne's stepfather.

She was the first wife of Louis of Luxembourg, Count of Saint-Pol, of Brienne, de Ligny, and Conversano, Constable of France. From their marriage descended Mary, Queen of Scots, King Henry IV of France and the subsequent Bourbon kings of France.

Jeanne was born in 1415, the only child of Robert of Bar, Count of Marle and Soissons, Sire d'Oisy (1390- 25 October 1415) and Jeanne de Béthune, Viscountess of Meaux (c.1397- late 1450). Her paternal grandparents were Henry of Bar, Marquis Pont-à-Mousson and Marie de Coucy, Countess of Soissons, and her maternal grandparents were Robert VIII de Béthune, Viscount of Meaux, and Isabelle de Ghistelles, daughter of Jean VII de Ghistelles and Marguerite de Reingleset. Through her paternal grandmother, Jeanne was a descendant of King Edward III of England and Philippa of Hainault - their eldest daughter Isabella being the mother of Marie de Coucy.