Robert IV of Dreux
Robert IV of Dreux (1241–1282), son of John I and Marie of Bourbon, held the counties of Dreux and Braine and, through his wife, Montfort-l'Amaury. In 1260 he married Beatrice, heiress of Count John I of Montfort, joining the Montfort inheritance to his own lands.
He campaigned with King Philip III the Bold in Languedoc in 1272. His daughter Yolande married King Alexander III of Scotland, and on his death in 1282 his son John II succeeded him as count.