Robert I de Beu (1217-1266) (1217–1266) Parents Robert III, Count of Dreux Aénor de Saint-Valery Children Isabelle de Dreux, Dame de Nesles-en-Tardenois Robert II de Beu Alix of Dreux Siblings John I, Count of Dreux Yolande of Dreux, Duchess of Burgundy Partners Clemence, Viscountess of Châteaudun
