Isabella of Navarre, Countess of Armagnac Spanish infante (1395–1450) Parents Eleanor of Castile, Queen of Navarre Charles III of Navarre Children Isabel of Armagnac Eleonor of Armagnac John V, Count of Armagnac Charles I, Count of Armagnac Marie of Armagnac Siblings Beatrice of Navarre, Countess of La Marche Carlo di Navarra Luis of Navarre Joan of Navarre Blanche I of Navarre Godofre de Navarra Lancelot de Navarre Juana de Navarra y Esparza Partners John IV, Count of Armagnac