????-1420 : Jean de Fayel († 1420), viscount of Breteuil, Count of Dammartin, son of Guillaume de Fayel, viscount of Breteuil, and of Marguerite de Châtillon.
The English, who occupied the northern half of France, confiscate the County of Dammartin and gave it to a Burgundian lord, Antoine de Vergy.