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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
John III, Count of Dreux
John III( – 1331), Count of Dreux, was the second son of John II of Dreux and of Jeanne of Beaujeu.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
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.
Margaret II, Countess of Flanders
Margaret, often called Margaret of Constantinople (2 June 1202 – 10 February 1280), ruled as Countess of Flanders during 1244–1278 and Countess of Hainaut during 1244–1253 and 1257–1280.
She was the younger daughter of Baldwin IX, Count of Flanders and Hainaut, and Marie of Champagne.
Called the Black (la Noire) due to her scandalous life, the children of both her marriages disputed the inheritance of her counties in the War of the Succession of Flanders and Hainault.
Joan of Dampierre
Joan of Dampierre (c. 1225–1245/1246) was the only daughter of Margaret II, Countess of Flanders, and William II of Dampierre.
In 1239, her mother arranged her to be wed to count Hugh III of Rethel.
Margaret stipulated that her dowry should be returned in case the count died without giving Joan a child.
When this indeed happened, the money was refunded.
Joan was betrothed to Theobald II, Count of Bar, in 1243 and married him two years later.
She died childless not long afterwards.
Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.
Guy II of Dampierre
Guy II of Dampierre( died 18 January 1216) was constable of Champagne, and Lord of Dampierre, Bourbon and Montluçon.
He was the only son of William I of Dampierre, Lord of Dampierre, and Ermengarde of Mouchy.
William I of Dampierre was the son of Guy I, Lord of Dampierre and Viscount of Troyes, and Helvide de Baudémont.
Guy II participated in the Third Crusade as a member of an advance party who initiated the Siege of Acre in the fall of 1189.
In 1212, Guy was sent at the head of a royal army sent by King Philip II of France to confiscate the lands of Count Guy II of Auvergne.
He took Nonette, Tournoël Castle, Riom in December 1213, and removed Guy Auvergne from power.
His participation in the Battle of Bouvines in 1214, was decisive in the French victory.

Question: Who is the maternal grandmother of Joan Of Dampierre?
Answer: Marie of Champagne