William IX Palaeologus was Marquis of Montferrat from 1494 until his death. He was a member of the House of Palaeologus-Montferrat, a cadet branch of the Palaiologos dynasty which had once ruled the Byzantine Empire. Wikipedia
Born: August 10, 1486, Pontestura, Italy
Died: October 4, 1518 (age 32 years), Trino, Italy
Grandchildren: Guglielmo Gonzaga, Duke of Mantua, Federico Gonzaga, Louis de Gonzague duc de Nevers, and more
Children: Boniface IV, Marquis of Montferrat, Maria Paleologa, and Margaret Paleologa
Parents: Boniface III, Marquis of Montferrat and Marija Branković
Great grandchildren: Vincenzo I Gonzaga, Duke of Mantua, Charles I Gonzaga, Duke of Mantua, Margherita Gonzaga, Duchess of Ferrara, and more
Great-grandparents: Theodore II, Marquis of Montferrat, Amadeus VII, Count of Savoy, Joanna of Bar, and more