Gaston Phoebus (Gaston III de Foix)-Le princ et le diable-book 2007/#fr.wiki#/Gaston de Foix-Béarn, only child of the marriage of Gaston III.Phoebus with Agnes of Navarre, born in 1362. He married Beatrice Armagnac, daughter of Jean II Armagnac (c. 1333-1384), but has no offspring. He was imprisoned because of his alleged involvement in a conspiracy against his father, according to the account of Froissart, during an argument with his halfbrother Jean Bastard de Béarn, the latter discovered...