Count Jean de Dunois (Jean d'Orléans) (November 23, 1402 – November 24, 1468) was the bastard of Louis d'Orléans (Duc d'Orléans 1372-1407) and Mariette d'Enghien .

He joined the civil war in France in the time of Charles VI on the side of the Armagnacs, and was captured by the Burgundians in 1418. Released in 1420, he entered the service of the Dauphin Charles, fighting in the Hundred Years War against English forces. Dunois, together with Joan of Arc, relieved the siege of Orléans and went on to further victories. They succeeded in capturing Reims, which enabled Charles to be crowned as Charles VII of France.

He went on to distinguish himself further in battle after the death of Joan of Arc.

Titles

• Lord of Valbonais (1421-1468)
• Count of Dunois (1439-1468)
• Count of Longueville (1443-1468)

Marriages and progeny

He married Marie Louvet (died 1426) in April 1422 at Bourges, with no issue.

He married a second time to Marie d'Harcourt (died 1464), Lady of Parthenay October 26, 1439 and had two children:

• François d'Orléans-Longueville (1447-1491), Count of Dunois, Tancarville, Longueville, and Montgomery, Baron of Varenguebec, Viscount of Melun, Chamberlain of France, Governor of Normandy and the Dauphiné, Constable and Chamberlain of Normandy, married July 2, 1466 to Agnès de Savoie (1445-1508)
• Catherine d'Orléans (1449-1501), married May 14, 1468 to John VII of Saarbrucken (1430-1492), Count of Roucy