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.
Archduchess Maria Annunciata of Austria
Archduchess Maria Annunciata of Austria (13 July 1876 – 8 April 1961) was a daughter of Archduke Karl Ludwig of Austria and his third wife, Infanta Maria Theresa of Portugal.
She was Princess-Abbess of the Theresian Royal and Imperial Ladies Chapter of the Castle of Prague (1894–1918).
Archduke Carl Christian of Austria
Archduke Carl Christian of Austria( born 26 August 1954 at Château de Belœil in Belœil, Belgium) is a Belgian aristocrat and a member of the formerly ruling Austro- Hungarian House of Habsburg- Lorraine.
He is the third child of Archduke Carl Ludwig of Austria and his wife, Princess Yolande de Ligne.
Archduke Carl Ludwig of Austria (1918–2007)
Archduke Carl Ludwig of Austria (
Carl Ludwig Maria Franz Joseph
Michael Gabriel Antonius Robert Stephan Pius Gregor Ignatius Markus d'Aviano; 10 March 1918 – 11 December 2007), also known as Carl Ludwig Habsburg-Lothringen, was the fifth child of Charles I of Austria and Princess Zita of Bourbon-Parma.
He was born in Baden bei Wien and died in Brussels.
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.
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.
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.
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.
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 Yolande of Austria
Archduchess Yolande of Austria( née Princesse Yolande Marie Jeanne Charlotte de Ligne; born 6 May 1923) is the widow of Archduke Carl Ludwig of Austria.

Question: Who is the maternal grandmother of Archduke Carl Ludwig Of Austria (1918–2007)?
Answer: Infanta Maria Antonia of Portugal