Prince Alberto of Naples and Sicily
Alberto of Naples and Sicily (Alberto Lodovico Maria Filipo Gaetano; 2 May 1792 – 25 December 1798) was a Prince of Naples and Sicily.
He died on board , a British Royal Navy vessel.
Princess Maria Cristina Amelia of Naples and Sicily
Maria Cristina Amelia of Naples and Sicily( 17 January
1779 – 26 February 1783) was a Princess of Naples and Sicily and twin sister of the future Queen of Sardinia.
She died of smallpox in 1783.
Carlo, Duke of Calabria
Carlo of Naples and Sicily (4 January 1775 – 17 December 1778) was Duke of Calabria as heir to Naples and Sicily.
Ferdinand I of the Two Sicilies
Ferdinand I (12 January 1751 – 4 January 1825), was the King of the Two Sicilies from 1816, after his restoration following victory in the Napoleonic Wars.
Before that he had been, since 1759, Ferdinand IV of the Kingdom of Naples and Ferdinand III of the Kingdom of Sicily.
He was also King of Gozo.
He was deposed twice from the throne of Naples: once by the revolutionary Parthenopean Republic for six months in 1799 and again by Napoleon Bonaparte in 1805.
Ferdinand was the third son of King Charles VII of Naples and V of Sicily by his wife, Maria Amalia of Saxony.
On 10 August 1759, Charles succeeded his elder brother, Ferdinand VI, becoming King Charles III of Spain, but treaty provisions made him ineligible to hold all three crowns.
On 6 October, he abdicated his Neapolitan and Sicilian titles in favour of his third son, because his eldest son Philip had been excluded from succession due to illnesses and his second son Charles was heir to the Spanish throne.
Ferdinand was the founder of the cadet House of Bourbon-Two Sicilies.
Archduchess Marie Anne of Austria
Marie Anne of Austria(" Maria Anna Franziska Theresia Josepha Medarde"; 8 June 1804 – 28 December 1858) was an Archduchess of Austria and the daughter of Franz II, Holy Roman Emperor and his second wife, Maria Theresa of Naples and Sicily.
Maria Cristina of Naples and Sicily
Maria Cristina of Naples and Sicily (Maria Cristina Amelia Teresa; 17 January 1779 – 11 March 1849) was a Princess of Naples and Sicily and later Queen of Sardinia as wife of King Charles Felix.
Maria Theresa of Naples and Sicily
Maria Theresa of Naples and Sicily (6 June 1772 – 13 April 1807) was the last Holy Roman Empress and the first Empress of Austria by marriage to Francis II, Holy Roman Emperor.
She was the eldest daughter of Ferdinand IV & III of Naples and Sicily (later Ferdinand I of the Two Sicilies) (1751–1825) and Marie Caroline of Austria (1752–1814).
Prince Giuseppe of Naples and Sicily
Giuseppe of Naples and Sicily( Giuseppe Carlo Gennaro; 18 June 1781 – 19 February 1783) was the first" Prince of Naples and Sicily".
He died of smallpox aged 20 months, the title was later conferred by Joseph Bonaparte to be hereditary on his children and grandchildren.
Prince Gennaro of Naples and Sicily
Gennaro of Naples and Sicily( Gennaro Carlo Francesco; 12 April 1780 – 1 January 1789) was a Prince of Naples and Sicily.
He died of smallpox at age 8.
He and his mother are the central figures of a portrait by Angelica Kauffman in 1783.
Princess Maria Isabella of Naples and Sicily
Maria Isabelle of Naples and Sicily
( 2 December 1793 – 23 April 1801) was a member of the Bourbons of Naples and Sicily( itself descended from the Bourbons of France).
She was styled" Princess of Naples and Sicily".

Question: Who is Maria Theresa Of Naples And Sicily's paternal grandmother?
Answer: Maria Amalia of Saxony