Guy V of Saint-Pol

Guy V of Châtillon, Count of Saint-Pol from 1344 to 1360, was the son of John of Saint-Pol and Jeanne de Fiennes. He married Jeanne of Luxembourg. A commander in the Hundred Years' War, he served as royal lieutenant against the English in Picardy and fought at Crécy in 1346 beside his uncle Robert de Fiennes.

In 1358 he helped suppress the Jacquerie and campaigned against the partisans of Charles the Bad of Navarre, taking part in the eight-month siege that recovered Saint-Valery from the Navarrese.

The 1360 Treaty of Brétigny freed King John II after four years in London but required hostages for his ransom. Guy was one of them, and by one account died of plague soon after reaching London. He left no children, so his sister Mathilde inherited Saint-Pol.