John of Austria the Younger, Spanish general and politician, Governor of the Habsburg Netherlands (born 1629)

John Joseph of Austria or John of Austria (the Younger) (Spanish: Don Juan José de Austria; 7 April 1629 – 17 September 1679) was a Spanish general and political figure. He was the only illegitimate son of Philip IV of Spain to be acknowledged by the King and trained for military command and political administration. Don John advanced the causes of the Spanish Crown militarily and diplomatically in Naples, Sicily, Catalonia, the Netherlands, Portugal, Dunkirk, and other fronts. He was the governor of the Spanish Netherlands from 1656 to 1659. He remained a popular hero even as the fortunes of Imperial Spain began to decline. His feuds with his father's widow, Queen Mariana of Austria, led to a 1677 palace coup through which he exiled Mariana and took control of the monarchy of his half-brother Charles II of Spain. However, he proved far from the saviour Spain had hoped he would be. He remained in power until his death in 1679.

The governor or governor-general of the Habsburg Netherlands was a representative appointed by the Holy Roman emperor (1504-1556), the king of Spain, and the archduke of Austria (1716-1794), to administer the Burgundian inheritance of the House of Habsburg in the Low Countries when the monarch was absent from the territory. The role of the governors-general significantly changed over time: initially tutors and advisors of Emperor Charles V, who lived at the Palace of Coudenberg, they served as generals during the Eighty Years' War between the Kingdom of Spain and the Dutch Republic. Frequently, the governor-general was a close relative of the Austrian or Spanish monarchs, though at other times Spanish or German noblemen filled the role. The governor-general was usually based in Brussels.