Philip III of Spain King of Castilla and León and King of Aragon and Portugal (1578-1621) (1578–1621) Parents Anna of Austria, Queen of Spain Philip II of Spain Children Infante Alonso of Austria Infanta Margarita of Spain Cardinal-Infante Ferdinand of Austria Philip IV of Spain Maria Anna of Spain Anne of Austria Infante Carlos of Spain Infanta Maria of Austria Siblings Carlos, Prince of Asturias Infanta Maria of Spain Ferdinand, Prince of Asturias Catalina Micaela of Spain Infante Carlos Lorenzo of Spain Diego, Prince of Asturias Isabella Clara Eugenia of Spain Pedro de Osorio Partners Margaret of Austria, Queen of Spain
