Philip of Burgundy
On 19 February 1350, at the royal "Château de Sainte-Gemme", John married Joanna I of Auvergne (d. 1361), Countess of Auvergne and Boulogne. Joanna was the widow of Philip of Burgundy, the deceased heir of that duchy, and the mother of the young Philip I, Duke of Burgundy (1344–61) who became John's stepson and ward. John and Joanna had three children, all of whom died shortly after birth: