John, Dauphin of France and Duke of Touraine (31 August 1398 – 5 April 1417) was the fourth son and ninth child of Charles VI of France and Isabeau of Bavaria. He was born in Paris. After his three elder brothers died, he became Dauphin in 1415. In 1406 he married Jacqueline, heiress of the County of Hainaut, Holland, Zealand, and Frisia. After his marriage to Jacqueline, he was brought up at the castle of Le Quesnoy in Hainaut, at the court of his mother-in-law, Margaret of Burgundy. This arrangement was made between his father and his father-in-law to ensure his safety away from the tulmultous court in Paris, as well as to acquaint him with the lands which he would rule as husband of Jacqueline after her father's death. After the death of his elder brother Louis in December 1415, he became the next Dauphin of France.