Question: Who is the maternal grandmother of Marie De Namur?

Knowledge 1: Marie de Namur
Marie of Namur, also known as Marie de Namur or Maria van Dampierre.Her titles were "Gräfin von Vianden", from her first marriage and "Dame de Pierrepont", from her second marriage to, Theobald of Bar.Born in 1322 to John I of Namur and his wife Marie of Artois.She had three sisters, including Blanche of Namur, Queen consort of Sweden and Norway, and seven brothers.In 1335/36, she married her first husband, Henry II, Graf of Vianden, son of Philip II, Graf of Vianden and his first wife Lucia von der Neuerburg.Henry was murdered at Famagusta in September 1337.In c. 1337, she gave birth to Maria of Vianden her first daughter from her marriage to Henry II, Graf of Vianden.Her second marriage in 1340 (dispensation 9 September 1342) was to her father's second cousin, Theobald of Bar, Seigneur de Pierrepont, son of Erard of Bar, Seigneur de Pierrepontet d'Ancerville (himself son of Theobald II of Bar), and his wife Isabelle of Lorraine (daughter of Theobald II, Duke of Lorraine).This marriage produced two daughters, Yolande de Bar (b. c 1343 – d. c 1410) and Elisabeth de Bar (b. c1345 – d. before 11 May 1411).Marie died somewhere before 29 October 1353/57. [SEP] Knowledge 2: Marie of Artois
Marie of Artois (French: Marie d'Artois, Dutch: Maria van Artesië.)Born in 1291, was the fourth daughter of Philip of Artois and Blanche of Brittany.She became the Lady of Méraude (Merode) when she purchased it from John the Blind, King of Bohemia, in 1342.
Knowledge 1: Marie de Namur
Marie of Namur, also known as Marie de Namur or Maria van Dampierre.Her titles were "Gräfin von Vianden", from her first marriage and "Dame de Pierrepont", from her second marriage to, Theobald of Bar.Born in 1322 to John I of Namur and his wife Marie of Artois.She had three sisters, including Blanche of Namur, Queen consort of Sweden and Norway, and seven brothers.In 1335/36, she married her first husband, Henry II, Graf of Vianden, son of Philip II, Graf of Vianden and his first wife Lucia von der Neuerburg.Henry was murdered at Famagusta in September 1337.In c. 1337, she gave birth to Maria of Vianden her first daughter from her marriage to Henry II, Graf of Vianden.Her second marriage in 1340 (dispensation 9 September 1342) was to her father's second cousin, Theobald of Bar, Seigneur de Pierrepont, son of Erard of Bar, Seigneur de Pierrepontet d'Ancerville (himself son of Theobald II of Bar), and his wife Isabelle of Lorraine (daughter of Theobald II, Duke of Lorraine).This marriage produced two daughters, Yolande de Bar (b. c 1343 – d. c 1410) and Elisabeth de Bar (b. c1345 – d. before 11 May 1411).Marie died somewhere before 29 October 1353/57. [SEP] Knowledge 2: Kaoru Hatoyama
After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama.
Knowledge 1: Marie de Namur
Marie of Namur, also known as Marie de Namur or Maria van Dampierre.Her titles were "Gräfin von Vianden", from her first marriage and "Dame de Pierrepont", from her second marriage to, Theobald of Bar.Born in 1322 to John I of Namur and his wife Marie of Artois.She had three sisters, including Blanche of Namur, Queen consort of Sweden and Norway, and seven brothers.In 1335/36, she married her first husband, Henry II, Graf of Vianden, son of Philip II, Graf of Vianden and his first wife Lucia von der Neuerburg.Henry was murdered at Famagusta in September 1337.In c. 1337, she gave birth to Maria of Vianden her first daughter from her marriage to Henry II, Graf of Vianden.Her second marriage in 1340 (dispensation 9 September 1342) was to her father's second cousin, Theobald of Bar, Seigneur de Pierrepont, son of Erard of Bar, Seigneur de Pierrepontet d'Ancerville (himself son of Theobald II of Bar), and his wife Isabelle of Lorraine (daughter of Theobald II, Duke of Lorraine).This marriage produced two daughters, Yolande de Bar (b. c 1343 – d. c 1410) and Elisabeth de Bar (b. c1345 – d. before 11 May 1411).Marie died somewhere before 29 October 1353/57. [SEP] Knowledge 2: Anne Denman
Anne Denman( 1587–1661) was born in Olde Hall, Retford, Nottinghamshire.Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne.

Answer: Blanche of Brittany