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.
Maria Chiara Spinucci
Maria Chiara Spinucci( 1741–1792), was an Italian aristocrat, courtier of Duchess Maria Antonia of Bavaria and the morganatic spouse of Prince Francis Xavier of Saxony.
Princess Maria Antonia of Naples and Sicily
Maria Antonia of Naples and Sicily( 14 December 1784 – 21 May 1806), was the youngest daughter of Ferdinand, King of Naples and Sicily, and Maria Carolina of Austria.
As the wife of the future Ferdinand VII of Spain, then heir apparent to the Spanish throne, she held the title of Princess of Asturias.
Archduchess Maria Antonia of Austria (1858–1883)
Archduchess Maria Antonia of Austria, Princess of Tuscany ("Maria Antonia Leopoldina Annunciata Anna Amalia Josepha Johanna Thelka"; 10 January 1858 – 13 April 1883) was a member of the House of Habsburg-Lorraine.
She served as the Princess-Abbess of the Theresian Royal and Imperial Convent in Hradčany from 1881 until her death in 1883.
Princess Maria Antonia of Parma
Maria Antonia of Parma (Maria Antonia Giuseppa Walburga Anna Luisa Vicenza Margherita Caterina; 28 November 1774 – 20 February 1841) was a Princess of Parma, daughter of Duke Ferdinand I of Parma and his wife, Archduchess Maria Amalia of Austria.
Contrary to what has been frequently stated, she was not named after her aunt, Queen Marie Antoinette of France, who was not her godmother.
Maria Antonia's godparents were her uncle, Emperor Joseph II, and her father's aunt, Maria Antonia of Spain, Queen of Sardinia, after whom the princess was named.
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.
Infanta Blanca of Spain
Infanta Blanca of Spain (7 September 1868 – 25 October 1949) was the eldest child of Carlos, Duke of Madrid, Carlist claimant to the throne of Spain and his wife Princess Margherita of Bourbon-Parma.
Blanca was a member of the House of Bourbon and - according to the Carlists - an Infanta of Spain by birth.
In 1889 she married Archduke Leopold Salvator of Austria.
The couple had ten children.
The family left Austria after the end of the Monarchy and finally settled in Barcelona.
When the male line of Blanca's family died out at the death of her uncle, Alfonso Carlos, Duke of San Jaime, some of the Carlists recognized her as the legitimate heiress to the Spanish throne.
Princess Maria Antonia of the Two Sicilies
Princess Maria Antonia of the Two Sicilies (Maria Antonietta Giuseppa Anna; 19 December 1814 – 7 November 1898) was the Grand Duchess of Tuscany from 1833 to 1859 as the consort of Leopold II.
In signature, she used "Maria Antonietta".
Maria Antonia of Austria
Maria Antonia of Austria (Maria Antonia Josepha Benedicta Rosalia Petronella; 18 January 1669 – 24 December 1692) was an Electress of Bavaria by marriage to Maximilian II Emanuel, Elector of Bavaria.
She was the eldest daughter and only surviving child of Holy Roman Emperor Leopold I and his wife Margaret Theresa of Spain.
She was the heir to the Spanish throne after her maternal uncle Charles II of Spain from 1673 until her death.
Joseph Ferdinand of Bavaria
Joseph Ferdinand Leopold of Bavaria( 28 October 1692 – 6 February 1699) was the son of Maximilian II Emanuel, Elector of Bavaria( 1679 – 1705, 1714 – 1726) and his first wife, Maria Antonia of Austria, daughter of Leopold I, Holy Roman Emperor, maternal granddaughter of King Philip IV of Spain.

Question: Who is Archduchess Maria Antonia Of Austria (1899–1977)'s maternal grandfather?
Answer: Carlos, Duke of Madrid