Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.
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.
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.
Bertha, daughter of Lothair II
Bertha (863-8 – March 925 in Lucca) was countess of Arles by marriage to Theobald of Arles, and margravine of Tuccany by marriage to Adalbert II of Tuscany.
She served as regent of Lucca and Tuscany from 915 until 916 during the minority of her son Guy of Tuscany.
She was described as beautiful, spirited, and courageous, and her influence over her spouse was, coupled with ambition, attributed to have involved her husbands in many wars.
She was the second illegitimate daughter of Lothair II, King of Lotharingia, by his concubine Waldrada.
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.
Hüma Hatun
Hüma Hatun (1410 ‒ September 1449) was the fourth wife of Ottoman Sultan Murad II and mother of Mehmed II and the grandmother of Bayezid II.
Ermengarde of Tuscany
Ermengarde of Tuscany (also "ErmengardaHermengarda")
(931/2) was a medieval Italian noblewoman.
She was the daughter of Bertha of Lotharingia and Adalbert II, Margrave of Tuscany.
She was countess of Ivrea through marriage to Adalbert I of Ivrea.
Alongside her half-brother Hugh of Italy Ermengarde was an important opponent of Rudolf II of Burgundy’s rule in Italy.
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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.

Question: Who is Ermengarde Of Tuscany's maternal grandmother?
Answer: Waldrada