Countess Anna of Nassau
Countess Anna of Nassau (5 November 1563 – 13 June 1588) was a daughter of William the Silent and his second wife, Anna of Saxony.
She was the wife of William Louis, Count of Nassau-Dillenburg.
Prince Daniel of Saxony
Prince Daniel Timo of Saxony, Duke of Saxony( born 23 June 1975) is the oldest son of Prince Rüdiger of Saxony, a disputed Head of the Royal House of Saxony.
Anna of Saxony, Electress of Brandenburg
Anna of Saxony (7 March 1437 – 31 October 1512) was a princess of Saxony by birth and Electress of Brandenburg by marriage.
Princess Anna of Saxony (1929–2012)
Princess Maria "Anna" Josepha of Saxony, Duchess of Saxony
(Full German name: "Maria Anna Josepha, Prinzessin von Sachsen, Herzogin zu Sachsen"; 13 December 1929 – 13 March 2012) was a Princess of Saxony and member of the House of Wettin by birth and a Princess of Gessaphe and member of the House of Afif-Gessaphe by marriage.
Anna was the third child and second-eldest daughter of Friedrich Christian, Margrave of Meissen and his wife Princess Elisabeth Helene of Thurn and Taxis, and a younger sister of Maria Emanuel, Margrave of Meissen and Albert, Margrave of Meissen, former heads of the Royal House of Saxony and senior claimants to the defunct throne of the Kingdom of Saxony.
Princess Anna of Montenegro
Princess Anna of Montenegro( 18 August 1873 – 22 April 1971) was the seventh child and sixth daughter of Nicholas I of Montenegro and his wife Milena Vukotić.
Anna of Saxony, Landgravine of Hesse
Anna of Saxony (5 June 1420 – 17 September 1462, Spangenberg) was a princess of Saxony and by marriage landgravine of Hesse.
Princess Elisabeth Helene of Thurn and Taxis
Princess Elisabeth Helene of Thurn and Taxis  (15 December 1903, Regensburg, Kingdom of Bavaria – 22 October 1976, Munich, Bavaria, Germany) was a Princess of Thurn and Taxis by birth and a Princess and Duchess of Saxony, Margravine of Meissen, and titular Queen consort of Saxony through her marriage to Friedrich Christian, Margrave of Meissen.
Elisabeth was the sixth child of Albert, 8th Prince of Thurn and Taxis and his wife Archduchess Margarethe Klementine of Austria.
Princess Anna of Bavaria
Princess Anna of Bavaria( née; Princess Anna- Natascha zu Sayn- Wittgenstein- Berleburg; born 15 March 1978) is a German journalist and author.
A member of the House of Sayn- Wittgenstein- Berleburg by birth, she became a member of the House of Wittelsbach in 2005 through her marriage to Prince Manuel of Bavaria.
Princess Mathilde of Saxony (born 1863)
Princess Mathilde of Saxony, Duchess of Saxony (19 March 1863 – 27 March 1933) was the third child and third-eldest daughter of George of Saxony and his wife, Maria Anna of Portugal.
She was an elder sister of the Kingdom of Saxony's last king, Frederick Augustus III of Saxony.
Prince Johann Georg of Saxony
Prince Johann Georg Pius Karl Leopold Maria Januarius Anacletus of Saxony, Duke of Saxony (10 July 1869 – 24 November 1938) was the sixth child and second-eldest son of George of Saxony and his wife Maria Anna of Portugal and a younger brother of the Kingdom of Saxony's last king, Frederick Augustus III of Saxony.
Johann Georg was a well-known arts expert and an avid art collector.

Question: Who is the maternal grandfather of Princess Anna Of Saxony (1929–2012)?
Answer: Albert, 8th Prince of Thurn and Taxis