Maximilian Henry of Bavaria
Maximilian Henry of Bavaria (: 8 October 1621 – 3 June 1688) was the third son and fourth child of Albert VI, landgrave of Leuchtenberg and his wife, Mechthilde von Leuchtenberg.
In 1650, he was named Archbishop- Elector of Cologne, Bishop of Hildesheim and Bishop of Liège succeeding his uncle, Ferdinand of Bavaria.
He worked throughout his career with the French to limit the authority of the Holy Roman Emperor, and participated in the Franco- Dutch War on the opposite side from the Empire.
Albert VI, Duke of Bavaria
Albert VI of Bavaria (26 February 1584 – 5 July 1666)
son of William V, Duke of Bavaria and Renata of Lorraine, born and died in Munich.
John VI, Duke of Mecklenburg
John VI, Duke of Mecklenburg( 1439 – 1474) was a Duke of Mecklenburg.
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.
Sigismund, Duke of Bavaria
Sigismund of Bavaria (26 July 1439 – 1 February 1501) was a member of the Wittelsbach dynasty.
He ruled as Duke of Bavaria-Munich from 1460 to 1467, and then as Duke of Bavaria-Dachau until his death.
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.
Susanna of Bavaria
Susanna of Bavaria (2 April 1502 – 23 April 1543) was a German noblewoman.
Born in Munich, she was the daughter of Albert IV, Duke of Bavaria, and Kunigunde of Austria, herself the daughter of Holy Roman Emperor Frederick III and Eleanor of Portugal.
Her paternal grandparents were Albert III, Duke of Bavaria, and Anna of Brunswick-Grubenhagen-Einbeck.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
Renata of Lorraine
Renata of Lorraine (20 April 1544 – 22 May 1602) was by birth a member of the House of Lorraine and by marriage Duchess of Bavaria.
Born in Nancy, France, she was the second child and eldest daughter of Francis I, Duke of Lorraine and Christina of Denmark.
Her paternal grandparents were Antoine, Duke of Lorraine and Renée of Bourbon-Montpensier and her maternal grandparents were Christian II of Denmark and Isabella of Austria.

Question: Who is Albert Vi, Duke Of Bavaria's maternal grandmother?
Answer: Christina of Denmark