Mathieu de Grailly or Mathieu de Foix was Count of Comminges between 1419 and 1443.
Background
He was the fourth son of Archambaud de Grailly, captal de Buch and Isabella, Countess of Foix. Foreign his loyalty, King Charles VI of France, allied with Philip the Good Duke of Burgundy, gave him Narbonne, of which he couldn"t take possession, because it was under control of Dauphin Charles, then at war with his father and Burgundy.
Career
Meanwhile, the unsatisfied people of Comminges petitioned the return of their Countess Marguerite from King Charles VII, who ordered her release. Charles VII put the County of Comminges under guardianship of John IV, Count of Armagnac and in 1441 war broke out between Foix and Armagnac, only interrupted in 1442 by a campaign against the English. After this campaign, Charles VII again ordered the liberation of Marguerite on 17 January 1443 and now, Mathieu was forced to obey.
Marguerite was released on 9 March but died shortly after, leaving Comminges to the Crown.
In 1449 Mathieu accompanied Gaston IV to besiege Mauléon. He died 4 years later.
Membership
He was knighted in 1413 and became a member of the entourage of John the Fearless, Duke of Burgundy.