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.
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.
Natasha Bagration
Princess Natalia
Bagration  (1914–1984) was a Georgian noblewoman of the House of Mukhrani.
Princess Natalia was born on 19 April 1914 and was a daughter of Prince Constantine Bagration of Mukhrani and Princess Tatiana Constantinovna of Russia.
Princess Natasha was born into two prominent royal dynasties, the Georgian Bagrationi dynasty and the Russian House of Romanov.
On 24 April 1945 she married British diplomat Charles Hepburn Johnston.
They had no children.
She died on 26 August 1984 in London and was buried there at Gunnersbury Cemetery.
She had a brother Teymuraz Bagration who lived in the United States.
Princess Tatiana Constantinovna of Russia
Princess Tatiana Konstantinovna of Russia
(Russian: Княжна Татьяна Константиовна; 23 January 1890 – 28 August 1979) was the third child and oldest daughter of Grand Duke Konstantin Konstantinovich of Russia and wife, Princess Elisabeth of Saxe-Altenburg.
Princess Tatiana Konstantinovna (not to be confused with her cousin, Grand Duchess Tatiana Nikolayevna, second daughter of Nicholas II, 1897–1918), had six brothers and two sisters, one which died at the age of two months.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
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.
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.
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.

Question: Who is Natasha Bagration's maternal grandmother?
Answer: Princess Elisabeth of Saxe-Altenburg