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 heiress to all 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.
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Family
Jeanne was born in 1415, the only child of Robert of Bar, Count of Marle and Soissons, Sire d'Oisy (1390- 25 October 1415), whose own mother was Marie de Coucy, Countess of Soissons, granddaughter of English King Edward III of England. Her mother was Jeanne de Béthune, Viscountess of Meaux (c.1397- late 1450).
On 25 October 1415, her father was killed in the Battle of Agincourt, leaving Jeanne, who was a baby, as sole heiress to her father's titles and estates. In 1418, her mother married secondly John II of Luxembourg, Count of Ligny and de Guise (1392 – 5 January 1441), son of John of Luxembourg, Sire de Beauvois and Marguerite of Enghien, Countess of Brienne and of Conversano. The marriage was childless.
