Question: Who is the mother of Guy Iv, Count Of Saint-Pol?

Knowledge 1: Guy IV, Count of Saint-Pol
Guy IV of Châtillon, Count of Saint Pol (– April 6, 1317) was a French nobleman.He was the son of Guy III, Count of Saint-Pol and Matilda of Brabant.In 1292, he married Marie of Brittany, daughter of John II, Duke of Brittany and Beatrice of England.They had eight children:He held the office of Grand Butler of France.He was placed in joint command (with Robert VI of Auvergne) of one of the two reserve "battles" of the French troops at the Battle of the Golden Spurs.He was able to escape when the French were routed by the Flemings, but his brother Jacques and many of his relatives were killed. [SEP] Knowledge 2: Guy III, Count of Saint-Pol
Guy III of Châtillon, Count of Saint-Pol (died 1289) was a French nobleman, and was 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, he married Matilda of Brabant, Countess of Artois, daughter of Henry II, Duke of Brabant and Marie of Hohenstaufen, and thereafter was a supporter of his brother-in-law Henry III against Guelders.They had:He joined the Eighth Crusade (1270) and the ill-fated Crusade of Aragón of Philip III of France.
Knowledge 1: Guy V, Count of Saint-Pol
Guy V of Châtillon, Count of Saint- Pol( d. 1360 in London) was a French nobleman.He was a member of the House of Châtillon and was the son of Count John of Saint- Pol( d. 1344) and his wife Johanna of Fiennes.In the Hundred Years' War, he served as a royal commander in the French army.He fought several battles against the English in Picardy.He was one of the hostages sent to England under the terms of the Treaty of Brétigny of 1360.He died of the plague shortly after arriving in London.Guy was married to Johanna( d. 1392), a daughter of Lord John I of Ligny.Since they had no children, he was succeeded as Count of Saint- Pol by his sister Mahaut and her husband Guy of Luxembourg- Ligny. [SEP] Knowledge 2: Joan, Countess of Ligny
Joan, Countess of Saint- Pol and Ligny( d. 18 September 1430, Avignon), called the Demoiselle de Luxembourg, was the daughter of Guy of Luxembourg, Count of Ligny and Mahaut of Châtillon, Countess of Saint- Pol.At the death of Philip I, Duke of Brabant, she was his nearest living relative on the Saint- Pol side and inherited Saint- Pol and Ligny upon his death on 14 August 1430.She was living at the time at Beaurevoir, which belonged to her favourite nephew John.At this time, John held Joan of Arc, whom he had captured, as a prisoner.The Demoiselle de Luxembourg showed kindness to her and pleaded with her nephew not to sell Joan to the English.The Demoiselle died shortly thereafter; her fiefs were divided between her senior nephew, the Count of Brienne, who received Saint- Pol, and John, her favourite, who received Ligny.The Demoiselle is a character in Philippa Gregory's 2011 historical novel" The Lady of the Rivers", which centres on her great- niece Jacquetta of Luxembourg.
Knowledge 1: Guy III, Count of Saint-Pol
Guy III of Châtillon, Count of Saint-Pol (died 1289) was a French nobleman, and was 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, he married Matilda of Brabant, Countess of Artois, daughter of Henry II, Duke of Brabant and Marie of Hohenstaufen, and thereafter was a supporter of his brother-in-law Henry III against Guelders.They had:He joined the Eighth Crusade (1270) and the ill-fated Crusade of Aragón of Philip III of France. [SEP] Knowledge 2: Hugh IV, Count of Saint-Pol
Hugh IV of Saint- Pol( died March 1205 in Constantinople) from the House of Campdavaine, son of Anselm of Saint- Pol, was Count of Saint- Pol from 1174 to his death, and lord of Demotika( Didymoteicho) in Thrace in 1204 – 05.He participated in the Third and Fourth Crusades.

Answer: Matilda of Brabant, Countess of Artois