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.
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.
Margaret de Stafford
Margaret Stafford( born c. 1364; died 9 June 1396) was the daughter of Hugh de Stafford, 2nd Earl of Stafford, and Philippa de Beauchamp.
She was the first wife of Ralph Neville, 1st Earl of Westmorland, and the grandmother of the 2nd Earl.
Enguerrand I, Count of Ponthieu
Enguerrand I was the son of Hugh I of Ponthieu and Gisela, daughter of Hugh Capet.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I: Diana Guardato is the 16th- Great Grandmother of His Royal Highness Albert II of Belgium, 15th- Great Grandmother of His Majesty Juan Carlos
I of Spain, 17th- Great Grandmother of Philippe of Belgium, 14th- Great Grandmother of His Majesty Manuel II of Portugal, 16th- Great Grandmother of Grand Duke Henri, as well as many others.
Hugh the Black
Hugh the Black (died 952) was Duke of Burgundy from 923 until his death in 952.
He was a Bosonid through his father, who was the younger brother of Boso of Provence.
Hugh was the son of Richard of Autun, Duke of Burgundy, and Adelaide of Auxerre.
He succeeded his older brother Rudolph as Duke of Burgundy, when Rudolph was elected King of West Francia, as Raoul, in 923.
Following Raoul's death in 936, Hugh may have had aspirations to follow his brother onto the throne and refused to recognize Louis IV as king of West Francia.
As a result, Louis sent Hugh the Great who captured Auxerre and Sens.
The Duchy of Burgundy was divided between Hugh the Great and Hugh the Black.
It is unknown whether Hugh married.
He probably died without living offspring, as he was succeeded as Duke of Burgundy by Gilbert of Chalon, who held the title of Duke of Burgundy "jure uxoris", his wife Ermengard being the daughter of Richard of Autun, and sister of Hugh.
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.
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.
Adelaide of Auxerre (born c. 870)
Adelaide of Auxerre (born between 865 - 870) was a Duchess consort of Burgundy in the Middle Ages.
She was the daughter of Conrad II, Duke of Transjurane Burgundy and his wife Waldrada of Worms.
In 888, she married Richard, Duke of Burgundy.
They had probably three or five children :

Question: Who is the maternal grandmother of Hugh The Black?
Answer: Waldrada of Worms