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.
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.
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.
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.
Princess Frederica Amalia of Denmark
Princess Frederica Amalia of Denmark and Norway (11 April 1649 – 30 October 1704) was the second daughter of King Frederick III of Denmark and Sophie Amalie of Brunswick-Lüneburg, and Duchess of Holstein-Gottorp from 1667 to 1695 as the consort of Duke Christian Albert.
Frederick IV, Duke of Holstein-Gottorp
Frederick IV (18 October 1671 – 19 July 1702) was the reigning Duke of Holstein-Gottorp.
He was born in Gottorf Castle as the elder son of Duke Christian Albert of Holstein-Gottorp and Princess Frederica Amalia of Denmark.
He was married on 12 May 1698 to Princess Hedwig Sophia of Sweden and they had an only child, Charles Frederick, who eventually fathered the future Tsar Peter III of Russia, therefore making Frederick a patrilineal ancestor to all Russian emperors after Catherine II.
He took part in the Great Northern War and was killed by artillery fire in the Battle of Kliszów in Poland.
According to Robert Massie's "Peter the Great: His Life and World", Duke Frederick arrived in Stockholm to marry his cousin, Princess Hedwig Sophia, soon befriending his first cousin and new brother-in-law, King Charles XII (their respective mothers, Frederica Amalia and Ulrika Eleonora, being daughters of Frederick III of Denmark).
His visit made such an impression on Swedish society that the excesses surrounding him and the King earned him "the Gottorp Fury" as a nickname.
Duke Frederick and King Charles regularly participated in wild festivities, drinking binges, and outlandish pranks.
Generally, Duke Frederick's influence was the blame for the King's "reckless" lifestyle.
There were even rumors at the time that the Duke sought to kill the King and usurp the throne.
As it happened, according to Massie in the aforementioned book, the 17-year-old King Charles, in the summer of 1699, pushed himself to an unbearable point of excess and vowed never to touch another drop of liquor again.
Apparently, writes Massie, the King stuck to beer thereafter, and even just drank beer when he was either wounded or post-battle.
As for his relationship with his cousin Frederick, they remained on good terms, so much that King Charles gave him military assistance to defend Holstein-Gottorp from Danish invasion.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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 Frederick Iv, Duke Of Holstein-Gottorp's maternal grandmother?
Answer: Sophie Amalie of Brunswick-Lüneburg