Countess Maria Draskovich of Trakostjan
Countess Maria Draskovich von Trakostjan( 8 March 190410 June 1969) was the first wife of Albrecht, Duke of Bavaria, head of the House of Wittelsbach and claimant to the abolished throne of the Kingdom of Bavaria from 1955 to 1969, as well as the Jacobite pretender to the English throne.
For Wittelsbach loyalists, she was the rightful Queen Consort of Bavaria from 1955 until her death, and for Jacobites, she was also the rightful Queen Consort of England, Scotland, Ireland and France during the same period.
Countess Marie-Jenke Keglevich of Buzin
Countess Marie- Jenke Keglevich of Buzin( 23 April 19215 October 1983) was the second wife of Albrecht, Duke of Bavaria, head of the House of Wittelsbach and pretender to the Kingdom of Bavaria from 1955 to 1996 as well as Jacobite pretender to the thrones of England, Scotland, Ireland, and France.
Wittelsbach loyalists hold that she was the rightful Queen Consort of Bavaria from 1971- 83.
Jacobites consider her the rightful Queen Consort of England, Scotland, Ireland, and France during the same period.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
Princess Irmingard of Bavaria
Princess Irmingard of Bavaria( 29 May 1923 – 23 October 2010) was the daughter of Rupprecht, Crown Prince of Bavaria and his second wife, Princess Antonia of Luxembourg.
She was a half- sister of Albrecht, Duke of Bavaria.
Duchess Marie Gabrielle in Bavaria
Duchess Marie Gabrielle in Bavaria (9 October 1878 in Tegernsee, Bavaria – 24 October 1912 in Sorrento, Italy) was the youngest daughter of Duke Karl Theodor in Bavaria and his second wife, Infanta Maria Josepha of Portugal.
She married Prince Rupprecht of Bavaria in 1900 but died before he became Crown Prince.
Through her second son Albrecht, Marie Gabrielle was the grandmother of the present Duke of Bavaria, Franz.
Philipp Albrecht, Duke of Württemberg
Philipp Albrecht, Duke of Württemberg(" George Philipp Albrecht Carl Maria Joseph Ludwig Hubertus Stanislaus Leopold Herzog von Württemberg", 14 November 1893 – 17 April 1975) was the son of Albrecht, Duke of Württemberg, and Archduchess Margarete Sophie of Austria.
He was born in Stuttgart, and became head of the formerly reigning royal House of Württemberg on the death of his father in 1939.
He died in Ravensburg, aged 81.
Albrecht, Duke of Bavaria
Albrecht, Duke of Bavaria (Albrecht Luitpold Ferdinand Michael; 3 May 1905 – 8 July 1996) was the son of the last crown prince of Bavaria, Rupprecht, and his first wife, Duchess Marie Gabrielle in Bavaria.
He was the only child from that marriage that reached adulthood.
His paternal grandfather was Ludwig III of Bavaria, the last king of Bavaria, who was deposed in 1918.
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.
Princess Maria Eleonore of Hesse-Rotenburg
Princess and Landgravine Maria Eleonore of Hesse-Rotenburg
(Maria Eleonore Amalia; 25 February 1675 – 27 January 1720) was Landgravine of Hesse-Rotenburg by birth and was the Countess Palatine of Sulzbach by marriage.
She is an ancestor of Albrecht, Duke of Bavaria.

Question: Who is Albrecht, Duke Of Bavaria's maternal grandmother?