Guyot de Champdivers, another of her brothers, is mentioned in September 1391 in the royal accounts as one of the pages and squires who served in the household of Queen Isabeau of Bavaria. In 1407, Guyot de Champdivers reappears as a squire baker of the Duke of Burgundy with a pension of 200 pounds. The same Guyot (or Guillaume) de Champdivers therefore remained a staunch partisan of both Burgundian Dukes, John the Fearless and later Philip III the Good. He served this two princes as an advisor of the King and the Duke in the most important cases including approximately between 1413 and 1425.