William VIII, Marquis of Montferrat

William VIII, Marquis of Montferrat
Marquis of Montferrat
Reign1464–1483
PredecessorJohn IV Palaiologos
SuccessorBoniface III Palaiologos
Born19 July 1420
Casale Monferrato
Died27 February 1483(1483-02-27) (aged 62)
Casale Monferrato
Noble familyPalaeologus-Montferrat
Spouse(s)
Marie de Foix
(m. 1465; died 1468)

Elisabetta Sforza
(m. 1469; died 1472)

Bernarde de Brosse
(m. 1474)
Issueby Marie
Giovanna of Montferrat
by Elisabetta
Blanche of Montferrat
illegitimate
Annibale
Lucrezia
Margherita
FatherJohn Jacob, Marquis of Montferrat
MotherJoanna of Savoy

William VIII Palaiologos (Italian: Guglielmo VIII Paleologo; 19 July 1420 – 27 February 1483) was the Marquis of Montferrat from 1464 until his death.

He was the second son of Marquis John Jacob and Joanna of Savoy, daughter of Amadeus VI of Savoy.

William inherited the Marquisate after the death of his elder brother John IV. He obtained, by Emperor Frederick III, the territories lost to Savoy from 1435. William served as condottiero for Francesco I Sforza of Milan and fought alongside him at the battle of Caravaggio(1448) and was afterwards rewarded with the lordship of Alessandria.

In 1449, William was accused of treachery and imprisoned by Francesco Sforza. The reason was said to because he had formed an attachment to Sforza's wife Bianca Maria Visconti. He was released a year later. Angry over his treatment by Sforza, William encouraged his brother John IV of Montferrat and relative Louis of Savoy to make war on Sforza (and Milan), and then he himself would lead the troops in battle. This attempt failed.

William later became a tutor to the couple's son Galeazzo Maria. Following his assassination, William held several positions in the Duchy of Milan.