Mafalda von Hessen
Mafalda Margarethe Prinzessin von Hessen( born 6 July 1965), known also as Princess Mafalda of Hesse, is a German aristocrat and fashion designer.
She is the eldest child of Moritz, Landgrave of Hesse and Princess Tatiana of Sayn- Wittgenstein- Berleburg.
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.
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.
Elena of Montenegro
Princess Elena of Montenegro, or more commonly known as Queen Elena of Italy (8 January 1873 – 28 November 1952) was the daughter of King Nicholas I of Montenegro and his wife, Milena Vukotić.
As wife of Victor Emmanuel III of Italy, she was Queen of Italy from 1900 until 1946, Empress consort of Ethiopia from 1936 until 1941 and Queen consort of the Albanians from 1939 until 1943.
Marie Jeanne Baptiste of Savoy-Nemours
Marie Jeanne Baptiste of Savoy- Nemours( 11 April 1644 – 15 March 1724) was born a Princess of Savoy and became the Duchess of Savoy by marriage.
First married by proxy to Charles of Lorraine in 1662, Lorraine soon refused to recognise the union and it was annulled.
She married Charles Emmanuel II, Duke of Savoy in 1665 who was her kinsman.
The mother of the future Victor Amadeus II of Sardinia who saw the elevation of the House of Savoy to kings, she styled herself as Madama Reale or Madame Royale.
She acted as Regent of Savoy from 1675 in the name of her son Victor Amadeus II, who was her husband's successor.
Her regency officially ended in 1680, but she maintained power until her son banished her from further influence in the state in 1684.
She left a considerable architectural legacy in Turin, and was responsible for the remodelling of the Palazzo Madama, which was her private residence.
At the time of her death she was the mother of the King of Sardinia as well as great grandmother of two other kings, Louis I of Spain and Louis XV of France.
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.
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.
Yolande Louise of Savoy
Yolande Louise of Savoy( 1487–1499), was a Duchess Consort of Savoy; married to Philibert II, Duke of Savoy.
Princess Mafalda of Savoy
Princess Mafalda of Savoy (2 November 1902 – 27 August 1944) was the second daughter of King Victor Emmanuel III of Italy and his wife Elena of Montenegro.
The future King Umberto II of Italy was her younger brother.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.

Question: Who is Princess Mafalda Of Savoy's maternal grandmother?
Answer: Milena Vukotić