Archduke Ferdinand Karl Joseph of Austria-Este
Archduke Ferdinand Karl Joseph of Austria-Este (25 April 1781 – 5 November 1850) was the third son of Archduke Ferdinand of Austria-Este and of his wife Princess Maria Beatrice Ricciarda d'Este, last member and heiress of the House of Este.
For much of the Napoleonic Wars he was in command of the Austrian army.
Ferdinand was born at Milan.
He attended the military academy in Wiener Neustadt before embarking on a military career.
In 1805 in the war of the Third Coalition against France, Ferdinand was commander-in-chief of the Austrian forces with General Karl Freiherr Mack von Leiberich as his quartermaster general.
In October his army was surrounded at Ulm.
General Mack surrendered, but Ferdinand managed to escape with 2000 cavalry to Bohemia.
There he took command of the Austrian troops and raised the local militia.
With a total of 9,000 men he set out for Iglau to distract attention from the Coalition's movements.
He succeeded in holding the Bavarian division of Prince Karl Philipp von Wrede in Iglau thereby and preventing it from joining the Battle of Austerlitz.
In 1809 in the war of the Fifth Coalition against France, Ferdinand commanded an Austrian army of 36,000 men.
In April he invaded the Duchy of Warsaw hoping to encourage a local uprising against Napoleon (see Polish–Austrian War).
But the Poles rallied to Prince Józef Antoni Poniatowski.
Ferdinand was defeated at the Battle of Raszyn, but managed to occupy Warsaw.
In June, however, Ferdinand was compelled to withdraw from Warsaw, and to give up Kraków and Galicia as well.
In 1815 in the war of the Seventh Coalition against France, Ferdinand commanded two divisions of the Austrian Reserve.
The following year he was appointed military commander in Hungary.
In 1830 Ferdinand was appointed military and civil governor of Galicia, taking up residence in Lviv.
After the Revolution of 1848 he resided mostly in Italy.
Ferdinand never married.
In 1850 he died at Schloss Ebenzweier in Altmünster near Gmunden, Austria.
Maria Theresa of Austria-Este (1849–1919)
Maria Theresa of Austria-Este (Maria Theresa Henriette Dorothee; 2 July 1849 – 3 February 1919) was the last Queen of Bavaria.
She was the daughter and only child of Archduke Ferdinand of Austria-Este and his wife, Archduchess Elisabeth of Austria.
Archduke Ferdinand Karl Viktor of Austria-Este
Ferdinand Karl Viktor( 20 July 1821 – 15 December 1849) was Archduke of Austria- Este and Prince of Modena.
Maria Ludovika of Austria-Este
Maria Ludovika of Austria- Este, also known as Maria Ludovika of Modena,( 14 December 1787 – 7 April 1816) was the daughter of Archduke Ferdinand of Austria- Este( 1754 – 1806) and his wife, Maria Beatrice Ricciarda d' Este( 1750 – 1829).
She was a member of the House of Austria- Este, a branch of the House of Habsburg- Lorraine.
Archduke Maximilian of Austria-Este
Archduke Maximilian Joseph of Austria- Este( July 14, 1782 – June 1, 1863), the fourth son of Archduke Ferdinand of Austria- Este and younger brother of Francis IV, Duke of Modena.
He was grand master of the Teutonic Knights from 1835 to 1863.
Prince Lorenz of Belgium, Archduke of Austria-Este
Prince Lorenz of Belgium, Archduke of Austria- Este( born 16 December 1955) is a member of the Belgian royal family by his marriage with Princess Astrid of Belgium.
Since 1996 he is also head of the House of Austria- Este, a cadet branch of the former Imperial Austrian House of Habsburg- Lorraine.
Archduke Otto of Austria (1865–1906)
Archduke Otto Franz Joseph Karl Ludwig Maria of Austria (21 April 1865 – 1 November 1906) was the second son of Archduke Karl Ludwig of Austria (younger brother of Emperor Franz Joseph I of Austria) and his second wife, Princess Maria Annunciata of Bourbon-Two Sicilies.
He was the father of Charles I of Austria, the last Emperor of Austria.
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.
Princess Elisabetta of Belgium
Princess Elisabetta of Belgium, Archduchess of Austria- Este( née" Nob." Elisabetta Rosboch von Wolkenstein on 9 September 1987) is the wife of Prince Amedeo of Belgium, Archduke of Austria- Este.
Ferdinand Karl, Archduke of Austria-Este
Archduke Ferdinand Karl of Austria-Este (Ferdinand Karl Anton Joseph Johann Stanislaus; 1 June 1754 – 24 December 1806) was a son of Holy Roman Emperor Franz I and Maria Theresa of Austria.
He was the founder of the House of Austria-Este and Governor of the Duchy of Milan between 1765 and 1796.
He was also designated as the heir to the Duchy of Modena and Reggio, but he never reigned, owing to the Napoleonic Wars.

Question: Who is the paternal grandmother of Archduke Ferdinand Karl Joseph Of Austria-Este?
Answer: Maria Theresa of Austria