Guy II of Saint-Pol

Guy IV of Châtillon, known as Guy II of Saint-Pol (c. 1197–1226), was the eldest son of Walter III of Châtillon and Elizabeth, heiress of Saint-Pol. He inherited the county on his father's death in 1219, though his mother held power until 1223. In 1221 he married Agnes II, Countess of Nevers; she died in 1225.

In 1226 he joined Louis VIII's Albigensian Crusade and led the main assault on Avignon, where a stone from the walls killed him. The county reverted to his mother.