Henry was the nephew of Adèle of Champagne, the Queen of France and mother of the future King Philip II. In , both Isabelle's father and. As we saw with the story of Isabella of Gloucester, King John of England was not a good king or a good husband. His marriage to Isabelle of. Isabella I was Queen of Castile. She was married to Ferdinand II of Aragon. Their marriage became the basis for the political unification of Spain under their Henry IV of Castile · Maria of Aragon, Queen of · Isabella of Portugal.