Princess Maria Immaculata of Bourbon-Two Sicilies (1844–1899)
Princess Maria Immaculata of Bourbon-Two Sicilies (Full Italian name: "Maria Immacolata Clementina, Principessa di Borbone delle
Due Sicilie")
(14 April 1844, Naples, Kingdom of the Two Sicilies – 18 February 1899, Vienna, Austria) was fifth child and second-eldest daughter of Ferdinand II of the Two Sicilies and his wife Maria Theresa of Austria.
Through her marriage to Archduke Karl Salvator of Austria, Maria Immaculata became an Austrian Archduchess.
Archduchess Maria Amalia of Austria (1780–1798)
Archduchess Maria Amalia of Austria ("Maria Amalia Josephe Johanna Katharina Theresia"; 15 October 1780 - 25 December 1798) was an Archduchess of Austria by birth.
Archduchess Maria Elisabeth of Austria (1737–1740)
Archduchess Maria Elisabeth of Austria( Full name( German):" Maria Elisabeth Amalia Antonia Josefa Gabriele Johanna Agathe"; 5 February 1737 – 7 June 1740), was the eldest child and daughter of Archduchess Maria Theresa of Austria, later Queen of Hungary and Bohemia, and Duke Francis of Lorraine, later Francis I, Holy Roman Emperor.
Archduchess Maria Antonia of Austria (1899–1977)
Archduchess Maria Antonia of Austria (13 July 1899 – 22 October 1977) was a daughter of Archduke Leopold Salvator of Austria and Infanta Blanca of Spain.
She was member of the Tuscan branch of the Imperial House of Habsburg, an Archduchess of Austria and Princess of Tuscany by birth.
In 1919, after the fall of the Austro Hungary Empire, she moved with her family to Spain.
In 1924 she married Ramón de Orlandis y Villalonga, a Spanish aristocrat.
When she became a widow during the Spanish civil war Archduchess Maria Antonia moved permanently to South America where she remarried.
Archduke Franz Karl of Austria
Archduke Franz Karl Joseph of Austria (17 December 1802 – 8 March 1878) was a member of the House of Habsburg-Lorraine.
He was the father of two emperors:
Franz Joseph I of Austria and Maximilian I of Mexico.
Through his third son Karl Ludwig, he was the grandfather of Archduke Franz Ferdinand of Austria – whose assassination sparked the hostilities that led to the outbreak of World War I – and the great-grandfather of the last Habsburg emperor Karl I.
Archduchess Maria Carolina of Austria (1740–1741)
Archduchess Maria Carolina of Austria (
Maria Carolina Ernestina Antonia Johanna Josefa; 12 January 1740 – 25 January 1741), was the third child and daughter of Archduchess Maria Theresa of Austria, later Holy Roman Empress and Duke Francis of Lorraine.
Archduchess Hedwig of Austria
Archduchess Hedwig of Austria( Hedwig Maria Immakulata Michaela Ignatia; 24 September 1896 in Bad Ischl – 1 November 1970 in Hall in Tirol) was the second daughter of Archduke Franz Salvator of Austria and his wife, Marie Valerie of Austria.
She was a granddaughter of Emperor Franz Joseph I and Duchess Elisabeth in Bavaria.
Archduchess Maria Luisa of Austria, Princess of Tuscany (1798-1857)
Archduchess Maria Luisa of Austria, Princess of Tuscany( 30 August 1798 – 15 June 1857) was a member of the House of Habsburg- Lorraine.
Archduchess Maria Theresa of Austria (1845–1927)
Archduchess Maria Theresa of Austria (15 July 1845 – 8 October 1927) was a member of the Austrian house of Habsburg-Lorraine.
Archduchess Maria Immakulata of Austria
Archduchess Maria Immakulata of Austria  (3 September 1878, Baden bei Wien, Lower Austria, Austria–Hungary – 25 November 1968, Schloss Altshausen, Altshausen, Baden-Württemberg, Germany) was a member of the House of Habsburg-Tuscany and Archduchess of Austria, Princess of Tuscany by birth.
Maria Immakulata was the seventh child and fifth eldest daughter of Archduke Karl Salvator of Austria and his wife Princess Maria Immaculata of Bourbon-Two Sicilies.

Question: Who is the maternal grandfather of Archduchess Maria Immakulata Of Austria?
Answer: Ferdinand II of the Two Sicilies