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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Archduchess Marie Astrid of Austria
Archduchess Marie Astrid of Austria( née" Princess Marie Astrid of Luxembourg"; born 17 February 1954 at Castle Betzdorf) is the elder daughter and eldest child of Grand Duke Jean of Luxembourg and Joséphine- Charlotte of Belgium, and the wife of Archduke Carl Christian of Austria.
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.
Prince Lorenz of Belgium, Archduke of Austria-Este
Prince Lorenz of Belgium, Archduke of Austria- Este( born 16 December 1955) is a member of the Belgian royal family by his marriage with Princess Astrid of Belgium.
Since 1996 he is also head of the House of Austria- Este, a cadet branch of the former Imperial Austrian House of Habsburg- Lorraine.
Princess Astrid, Mrs. Ferner
Princess Astrid, Mrs. Ferner (Astrid Maud Ingeborg; born 12 February 1932) is the second daughter of King Olav V of Norway and his wife, Princess Märtha of Sweden.
She is the older sister of King Harald V of Norway and younger sister of the late Princess Ragnhild.
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.
Olav V of Norway
Olav V (born Prince Alexander of Denmark; 2 July 1903 – 17 January 1991) was King of Norway from 1957 until his death.
Olav was the only child of King Haakon VII of Norway and Maud of Wales.
He became heir apparent to the Norwegian throne when his father was elected King of Norway in 1905.
He was the first heir to the Norwegian throne to be brought up in Norway since Olav IV in the fourteenth century, and his parents made sure he was given as Norwegian an upbringing as possible.
In preparation for his future role, he attended both civilian and military schools.
In 1929, he married his first cousin Princess Märtha of Sweden.
During World War II his leadership was much appreciated and he was appointed Norwegian Chief of Defence in 1944.
At his death in 1991, he was the last surviving grandchild of Edward VII of the United Kingdom and Alexandra of Denmark.
Owing to his considerate, down-to-earth style, King Olav was immensely popular, resulting in the nickname "FolkekongenThe People's King").
In a 2005 poll by the Norwegian Broadcasting Corporation, Olav was voted "Norwegian of the Century".
Prince Joachim of Belgium, Archduke of Austria-Este
Prince Joachim of Belgium, Archduke of Austria- Este(" Joachim Karl- Maria Nikolaus Isabelle Marcus d' Aviano"; born 9 December 1991), is the younger son and third child of Lorenz, Archduke of Austria- Este and Princess Astrid of Belgium.
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.

Question: Who is the paternal grandmother of Princess Astrid, Mrs. Ferner?
Answer: Maud of Wales