Geoffrey I of Vianden
Geoffrey I of Vianden" 7th duke of Vianden 1273- 1310"( 1310) was a son to duke Filips I of Vianden and Mary of Brabant- Perwez.
He succeeded to his father in 1273 in Vianden.
Geoffrey married Aleidis of Oudenaarde( 1260- 1305) and Lutgardis van Ligny and fathered:
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.
Yolanda of Vianden
Mother Yolanda (or Yolande, Iolanda) of Vianden, O.P., (1231–1283) was the youngest daughter of Count Henry I of Vianden and Margaret, Marchioness of Namur.
She joined the Dominican monastery in Marienthal, Luxembourg, against the wishes of her parents when she was very young.
She later became its devout prioress and is now a legend in the history of that nation.
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.
Margaret, Marchioness of Namur
Margaret, Marchioness of Namur (c. 1194 – 17 July 1270) was ruling Marchioness of Namur in 1229-1237.
She was the daughter of Peter II of Courtenay and Yolanda of Flanders.
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.
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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.

Question: Who is the maternal grandmother of Yolanda Of Vianden?