Question: Who is the paternal grandfather of Margaret, Countess Of Soissons?

Knowledge 1: Margaret, Countess of Soissons
Margaret (or Margaretha) of Soissons (died ca. 1350) was ruling Countess of Soissons in 1305-1344.She was the only daughter of Hugh, Count of Soissons, and Johanna of Argies.In 1306 she succeeded her father as Countess of Soissons.Margaret was married to John of Beaumont, son of John II, Count of Holland.Margaret and John had five children:
Upon their marriage, John became Count of Soissons, "jure uxoris". [SEP] Knowledge 2: Hugh, Count of Soissons
Hugh of Nesle (d. after October 1305), son of John IV, Count of Soissons, and his wife Marguerite of Rumigny.Count of Soissons.Hugh became count after the death of his brother John in 1304.Hugh married Jeanne de Dargies (Johanna of Argies), daughter of Renaud II, Seigneur de Dargies and Catheux, and his wife Agnes de Bruyères.Hugh and Jeanne had one child:After his death, Hugh’s widow Jeanne married John of Clermont, Baron of Charolais, son of Robert, Count of Clermont, and so grandson of Louis IX of France.Hugh was succeeded in his rule of the county by his daughter Margaret.
Knowledge 1: Margaret, Countess of Soissons
Margaret (or Margaretha) of Soissons (died ca. 1350) was ruling Countess of Soissons in 1305-1344.She was the only daughter of Hugh, Count of Soissons, and Johanna of Argies.In 1306 she succeeded her father as Countess of Soissons.Margaret was married to John of Beaumont, son of John II, Count of Holland.Margaret and John had five children:
Upon their marriage, John became Count of Soissons, "jure uxoris". [SEP] Knowledge 2: John III, Count of Soissons
John III (d. before 8 October 1286), son of John II, Count of Soissons, and Marie de Chimay.Count of Soissons and Seigneur of Chimay.John inherited the countship of Soissons upon his father’s death in 1272.John married Marguerite de Montfort, daughter of Amaury, Count of Montfort, and his wife Beatrix de Viennois.John and Marguerite had five children:
John was succeeded as Count of Soissons by his son and namesake upon the former’s death.
Knowledge 1: Hugh, Count of Soissons
Hugh of Nesle (d. after October 1305), son of John IV, Count of Soissons, and his wife Marguerite of Rumigny.Count of Soissons.Hugh became count after the death of his brother John in 1304.Hugh married Jeanne de Dargies (Johanna of Argies), daughter of Renaud II, Seigneur de Dargies and Catheux, and his wife Agnes de Bruyères.Hugh and Jeanne had one child:After his death, Hugh’s widow Jeanne married John of Clermont, Baron of Charolais, son of Robert, Count of Clermont, and so grandson of Louis IX of France.Hugh was succeeded in his rule of the county by his daughter Margaret. [SEP] Knowledge 2: John III, Count of Soissons
John III (d. before 8 October 1286), son of John II, Count of Soissons, and Marie de Chimay.Count of Soissons and Seigneur of Chimay.John inherited the countship of Soissons upon his father’s death in 1272.John married Marguerite de Montfort, daughter of Amaury, Count of Montfort, and his wife Beatrix de Viennois.John and Marguerite had five children:
John was succeeded as Count of Soissons by his son and namesake upon the former’s death.

Answer: John IV, Count of Soissons