Who married Philip, Duke of Orléans?

Philip of Orléans (1 July 1336 – 1 September 1375) was a Duke of Orléans, Touraine, and Count of Valois, the fifth son of King Philip VI of France and his wife Joan the Lame.

His father named him Duke of Orléans, a newly created duchy, in 1344. Shortly before that, in 1343, Philip's father (king Philip VI) initiated negotiations with the dauphin Humbert II of Viennois, regarding the future inheritance of the Dauphiné, a vast feudal polity within the Kingdom of Burgundy (Arles), then under the suzerainty of the Holy Roman Empire. Since Humbert had no heirs, it was initially agreed that all of his feudal domains will pass to young Philip, but already in 1344, those provisions were changed by the new agreement, designating Philip's older brother John as Humbert's heir in the Dauphiné, while Philip was compensated with other domains.

Blanche of France (1 April 1328 – 8 February 1393) was the posthumous daughter of King Charles IV of France and his third wife, Joan of Évreux (the daughter of Louis, Count of Évreux and Margaret of Artois). She was the last direct Capetian and the last-surviving member of her family, and her marriage to her second-cousin, Philip, Duke of Orléans, proved childless. With Blanche's death in 1393, the House of Capet continued to exist only via its numerous cadet branches.