Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Archduke Rudolf of Austria (1919–2010)
Archduke Rudolf of Austria (5 September 1919 – 15 May 2010) was the sixth child and youngest son of Emperor Charles I of Austria and Zita of Bourbon-Parma.
Archduchess Elisabeth Amalie of Austria
Archduchess Elisabeth Amalie of Austria (7 July 1878 – 13 March 1960) was a daughter of Archduke Karl Ludwig of Austria and his third wife Infanta Maria Theresa of Portugal.
She was the mother of Franz Joseph II, Prince of Liechtenstein, and the paternal grandmother of Hans-Adam II, Prince of Liechtenstein.
Archduke Simeon of Austria
Archduke Simeon of Austria( Simeon Carl Eugen Joseph Leopold; born 29 June 1958 in Katana, South Kivu, Belgian Congo) is a member of the House of Habsburg- Lorraine.
He is the third- eldest child of Archduke Rudolf of Austria and his first wife, Countess Xenia Czernichev- Besobrasov.
Simeon is a paternal grandson of Charles I of Austria and Zita of Bourbon- Parma.
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.
Zita of Bourbon-Parma
Zita of Bourbon-Parma ("Zita Maria delle Grazie Adelgonda Micaela Raffaela Gabriella Giuseppina Antonia Luisa Agnese"; 9 May 1892 – 14 March 1989) was the wife of Charles, the last monarch of Austria-Hungary.
As such, she was the last Empress of Austria and Queen of Hungary, in addition to other titles.
Born as the seventeenth child of the dispossessed Robert I, Duke of Parma, and his second wife, Infanta Maria Antonia of Portugal, Zita married the then Archduke Charles of Austria in 1911.
Charles became heir presumptive to the Emperor Franz Joseph
I of Austria in 1914 after the assassination of his uncle Archduke Franz Ferdinand of Austria, and acceded to the throne in 1916 after the old emperor's death.
After the end of World War I in 1918, the Habsburgs were deposed and the empire became four independent countries, Austria, Hungary, and the newly formed Czechoslovakia and State of Slovenes, Croats and Serbs.
Charles and Zita left for exile in Switzerland and were subsequently removed from Hungary by the Allies to Madeira, where Charles died in 1922.
After her husband's death, Zita and her son Otto served as symbols of unity for the exiled dynasty.
A devout Catholic, she raised a large family after being widowed at the age of 29, and never remarried.
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.
Archduke Otto of Austria (1865–1906)
Archduke Otto Franz Joseph Karl Ludwig Maria of Austria (21 April 1865 – 1 November 1906) was the second son of Archduke Karl Ludwig of Austria (younger brother of Emperor Franz Joseph I of Austria) and his second wife, Princess Maria Annunciata of Bourbon-Two Sicilies.
He was the father of Charles I of Austria, the last Emperor of Austria.
Countess Xenia Czernichev-Besobrasov
Countess Xenia Czernichev- Besobrasov( Chernysheva- Besobrasova; 11 June 1929 Paris 20 September 1968, Casteau, Belgium) was the first wife of Archduke Rudolf of Austria, the youngest son of the last reigning Emperor of Austria- Hungary, Charles I.
Eduard von Habsburg
Eduard von Habsburg( born January 12, 1967), also known as Archduke Eduard of Austria is Hungary ’s ambassador to the Holy See and Sovereign Military Order of Malta.
He is son of Archduke Michael of Austria( Archduke Joseph Francis's youngest child) and the great- great- grandson of Emperor Franz Joseph I.
He is married to Baroness Maria Theresia von Gudenus, descendant of Archduke Johann of Austria and has six children.

Question: Who is the maternal grandmother of Archduke Rudolf Of Austria (1919–2010)?
Answer: Infanta Maria Antonia of Portugal