Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
Duke Constantine Petrovich of Oldenburg
Duke Constantine Frederick Peter of Oldenburg (tr. ; 9 May 1850 - 18 March 1906) was a son of Duke Peter Georgievich of Oldenburg and his wife Princess Therese of Nassau-Weilburg Known in the court of Tsar Nicholas II as Prince Constantine Petrovich Oldenburgsky, he was the father of the Russian Counts and Countesses von Zarnekau.
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.
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.
Marianne Pistohlkors
Marianne Pistohlkors( born Marianna Erikovna von Pistohlkors; June 30, 1890 – May 14, 1976) was a Russian- born aristocrat and later an actress.
She was a suspected co-conspirator in the murder of Grigori Rasputin.
As the first wife of Count Nicholas von Zarnekau, she was known for many years as Countess Marianne von Zarnekau.
She became one of the first women of nobility to attend the Imperial School of Dramatic Arts, and she appeared under the stage name of Mariana Fiory in MGM's 1944 film," Song of Russia".
Countess Alexandra von Zarnekau
Countess Alexandra Constantinovna von Zarnekau (Russian: графиня Александра Константиновна Зарнекау, 10 May 1883 - 28 May 1957) was the eldest daughter of Duke Constantine Petrovich of Oldenburg and his morganatic wife, Agrippina Japaridze, Countess von Zarnekau.
At age 17, on 11 February 1900, Countess Alexandra married Prince George Alexandrovich Yuryevsky, the son of Tsar Alexander II by his mistress (and later wife), Ekaterina Mikhailovna Dolgorukova, the Princess Yourievskya.
They were married at Nice, France, and had one child, Prince Alexander Georgievich Yourievsky, who was born 20 December 1901.
Alexandra and George divorced in 1908.
Countess Alexandra married secondly to Leo Vassilievich Narishkin on 17 October 1908 at Paris, France.
During the First World War, Countess Alexandra worked as an administrator of the Russian hospital at Saloniki.
After the war, she settled in Paris, France.
She died there on 28 May 1957 at age 74.
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.
Alexandra von Fürstenberg
Alexandra von Fürstenberg( née Alexandra Natasha Miller, formerly Princess Alexandra von Fürstenberg, born October 3, 1972) is a furniture designer and the image director for DvF, the clothing label which was founded by her former mother- in- law, Diane von Fürstenberg, and helped revive the company ’s famous 1970s wrap dress.
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.

Question: Who is Countess Alexandra Von Zarnekau's paternal grandmother?
Answer: Princess Therese of Nassau-Weilburg