Hugh I of Châtillon

Hugh I of Châtillon (c. 1198–1248), son of Walter III of Châtillon and Elisabeth, heiress of Saint-Pol, became count of Saint-Pol in 1226. In 1226 he married Marie of Avesnes, heiress of the old line of Blois counts, and ruled Blois jure uxoris from 1230 until 1241, founding the Châtillon dynasty there.

He founded Cistercian nunneries at Pont-aux-Dames and L'Amour-Dieu in Troissy. His sons included John I, his successor in Blois, and Guy III of Saint-Pol. He planned to join Louis IX's Seventh Crusade but died on 9 April 1248.