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.
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.
Infanta Blanca of Spain
Infanta Blanca of Spain (7 September 1868 – 25 October 1949) was the eldest child of Carlos, Duke of Madrid, Carlist claimant to the throne of Spain and his wife Princess Margherita of Bourbon-Parma.
Blanca was a member of the House of Bourbon and - according to the Carlists - an Infanta of Spain by birth.
In 1889 she married Archduke Leopold Salvator of Austria.
The couple had ten children.
The family left Austria after the end of the Monarchy and finally settled in Barcelona.
When the male line of Blanca's family died out at the death of her uncle, Alfonso Carlos, Duke of San Jaime, some of the Carlists recognized her as the legitimate heiress to the Spanish throne.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Francesco Maria Taliani de Marchio
Francesco Maria Taliani de Marchio (22 October 1887 – 16 March 1968) was an Italian diplomat who was most notable for his role as ambassador to China (1938–1946) during World War II.
In this capacity he was accredited to the Japanese puppet state of the Reorganized National Government of China, under Wang Jingwei.
In 1943, he refused to pledge loyalty to the Italian Social Republic and was briefly imprisoned by the Japanese.
After the war he subsequently was made first Italian ambassador to Spain (1951–1952) since the countries broke relations in 1946.
Taliani was married to Archduchess Margaretha of Austria.
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.
Archduchess Margaretha of Austria
Archduchess Margaretha of Austria ((8 May 1894 – 21 January 1986) was a daughter of Archduke Leopold Salvator of Austria and Infanta Blanca of Spain.
She was member of the Tuscan branch of the Imperial House of Habsburg, an Archduchess of Austria and Princess of Tuscany by birth.
After the fall of the Austro-Hungarian Empire, she lived in exile, first in Barcelona and from the 1930s until the end of her life in Italy.
In 1937, she married an Italian diplomat, Marchese Francesco Maria Taliani de Marchio.
The couple, who had married in their forties, did not have children.
Archduchess Maria Carolina of Austria (1740–1741)
Archduchess Maria Carolina of Austria (
Maria Carolina Ernestina Antonia Johanna Josefa; 12 January 1740 – 25 January 1741), was the third child and daughter of Archduchess Maria Theresa of Austria, later Holy Roman Empress and Duke Francis of Lorraine.
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.
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 Archduchess Margaretha Of Austria?