Princess Carolina of Parma
Carolina Maria Teresa Giuseppa of Parma (22 November 1770 – 1 March 1804) was a Princess of Parma by birth, and Princess of Saxony by marriage to Prince Maximilian of Saxony.
Carolina was the eldest child of Ferdinand, Duke of Parma, and his wife Archduchess Maria Amalia of Austria.
Princess Maria Pia of Bourbon-Parma
Princess Maria Pia of Bourbon- Parma( née Princess Maria Pia of Savoy; born 24 September 1934) is the eldest daughter of Umberto II of Italy and Marie- José of Belgium.
She is the older sister of Princess Maria Gabriella of Savoy, Vittorio Emanuele, Prince of Naples, and Princess Maria Beatrice of Savoy.
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 Marie Caroline of Austria
Archduchess Maria Carolina Ferdinanda of Austria, Crown Princess of Saxony (8 April 1801 in Vienna, Austria – 22 May 1832 in Pillnitz, Germany).
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.
Princess Maria Josepha of Saxony (1867–1944)
Princess Maria Josepha of Saxony( 31 May 1867 – 28 May 1944) was the mother of Emperor Charles I of Austria and the fifth child of George of Saxony and Infanta Maria Anna of Portugal.
Princess Maria Ferdinanda of Saxony
Princess Maria Ferdinanda of Saxony (27 April 1796 – 3 January 1865) was a daughter of Maximilian, Crown Prince of Saxony and his first wife Princess Carolina of Parma.
She was by marriage Grand Duchess of Tuscany from 1821 to 1824.
Christina of Saxony
Christina of Saxony( b. Torgau, 25 December 1461 – d. Odense, 8 December 1521), was Queen consort of Denmark, Norway, and Sweden.
She was born a granddaughter of Frederick the Gentle of Saxony, and daughter of Ernest, Elector of Saxony and Elisabeth of Bavaria.
She was the grandmother of Christina of Denmark through her son Christian II.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.

Question: Who is the maternal grandmother of Princess Maria Ferdinanda Of Saxony?
Answer: Archduchess Maria Amalia of Austria