Guy III, Count of Saint-Pol
Guy III of Châtillon, Count of Saint-Pol was a French nobleman, and a younger son of Hugh I, [Count of Blois], and Mary, [Countess of Blois].
While his elder brother John I of Châtillon succeeded to their mother's County of Blois, Guy was given their father's county of Saint-Pol-sur-Ternoise at his death in 1248.
On January 16, 1255, Guy married Matilda of Brabant, Countess of Artois, daughter of Henry II, [Duke of Brabant] and Marie of Swabia, and thereafter was a supporter of his brother-in-law Henry III against Guelders. They had:
- Guy [IV, Count of Saint-Pol|Guy IV], Count of Saint-Pol.
- Hugh II, Count of Blois.
- Jacques [de Châtillon|Jacques], lord of Leuze-Châtillon.
- Beatrix, married John I of Brienne, Count of Eu
- Jeanne, married Guillaume III de Chauvigny, Lord of Châteauroux
- Gertrude, married Florent, Lord of Mechelen