William IX, Marquess of Montferrat

William IX, Marquess of Montferrat
Portrait of William IX by Macrino d'Alba
Marquess of Montferrat
Reign	1494 - 1518
Predecessor	Boniface III Palaiologos
Successor	Boniface IV Palaiologos
Spouse(s)	Anna d'Alençon
Issue Maria Palaeologina Margaret Palaeologina Boniface IV of Montferrat
Noble family	House of Palaiologos
Father	Boniface III, Marquess of Montferrat
Mother	Maria Branković
Born	10 August 1486
Died	1518 Trino

William IX (10 August 1486 - 1518) was marquess of Montferrat from 1494 until his death.

Biography

He was the son of marquis Boniface III and Maria Branković, daughter of prince Stefan III of Serbia.

After succeeding his father Boniface at his death (1494), he continued the latter's pro-French policy and, in 1508, he married to princess Anna d'Alençon, daughter of René d'Alençon. During the Italian Wars, in 1513, he protected the French retreat from Milan; however, to avoid retaliations from Maximilian Sforza William was forced to pay him 30,000 scudi.

The Milanese Duke did not respect the treaty, and his troops invaded Montferrat and sacked numerous cities. At the same time, informed that his relative Oddone, marquess of Incisa, was trying to obtain the title of marquess of Montferrat, William marched to Incisa and occupied that lordship. Oddone and his son Badone were sentenced to death. However, the annexation was later declared null by Holy Roman Empire diplomacy, but in the subsequent year William was able to maintain the new lands.

He had 3 children with Anna d'Alençon:

• Maria (1509–1530),
• Margherita (1510–1566), married Federico II Gonzaga, Duke of Mantua
• Boniface IV (1512–1530)

He died in 1518 and was succeeded by his son Boniface IV, initially with his mother Anne d'Alençon as regent.

Ancestry

Ancestors of William IX, Marquess of Montferrat

16. John II, Marquess of Montferrat               8. Theodore II, Marquess of Montferrat                       17. Isabella of Majorca               4. John Jacob, Marquess of Montferrat                             18. Robert I, Duke of Bar               9. Joanna of Bar                       19. Marie of Valois               2. Boniface III, Marquess of Montferrat                                   20. Amadeus VI, Count of Savoy               10. Amadeus VII, Count of Savoy                       21. Bonne of Bourbon               5. Joan of Savoy                             22. John, Duke of Berry               11. Bonne of Berry                       23. Joan of Armagnac               1. William IX Palaiologos, Marquess of Montferrat                                         24. Vuk Branković               12. Đurađ Branković                       25. Mara Lazarević               6. Stefan III Brankovic prince/ruler of Serbia                             26. Demetrios I Kantakouzenos               13. Irene Kantakouzene                       27.               3. Marija Branković                                   28. Komnen Arianiti               14. Gjergj Arianiti                       29. (daughter of Nikollë Zaharia)               7. Angelina Arianiti                             30.               15. Pietrina Francone                       31.