Robert de Melun was endowed with the lands confiscated from his brother, Pierre, who continued to support the revolt. He was also made Marquis of Roubaix, held a commission as a cavalry commander in the Army of Flanders, and was named a knight of the Golden Fleece. He died on 4 April 1585, from wounds sustained during the Siege of Antwerp, before being invested as a knight of the Fleece. He and his wife, Anne de Rollin, had been childless.