Princess Isabella of Bavaria
Princess Isabella of Bavaria (
Marie Elisabeth Luise Amalie Elvire Blanche Eleonore; 31 August 1863 – 26 February 1924) was the third child and eldest daughter of Prince Adalbert of Bavaria and his wife Infanta Amalia of Spain.
By her marriage to Prince Thomas, Duke of Genoa, she became referred to as the Duchess of Genoa.
Princess Maria Bona of Savoy-Genoa
Princess Bona of Savoy-Genoa, later Princess Bona of Bavaria
(Maria Bona Margherita Albertina Vittoria; 1 August 1896 – 2 February 1971), was a daughter of Prince Thomas, Duke of Genoa and Princess Isabella of Bavaria.
Princess Maria Isabella of Savoy-Genoa
Princess Maria Isabella of Savoy- Genoa( born 23 June 1943) is the last surviving male- line descendant of the Dukes of Genoa, a cadet branch of the House of Savoy which ruled Italy from 1861 to 1946.
Princess Maria Vittoria Margherita of Savoy
Maria Vittoria Margherita of Savoy( 22 June 1740 – 14 July 1742) was a princess of Savoy.
She was born in the reign of her father Charles Emmanuel III, King of Sardinia.
Margherita of Savoy
Margherita of Savoy(" Margherita Maria Teresa Giovanna"; 20 November 1851 – 4 January 1926) was the Queen consort of the Kingdom of Italy by marriage to Umberto I.
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.
Princess Luisa Cristina of Savoy
Princess Luisa Cristina of Savoy (27 July 1629 – 12 May 1692) was a Princess of Savoy by birth and the eldest daughter of Victor Amadeus I, Duke of Savoy.
She married her uncle Prince Maurice of Savoy but had no children.
She was the owner of the future "Villa della Regina".
She was a first cousin of Louis XIV of France and Charles II of England.
Princess Maria Adelaide of Savoy-Genoa
Princess Adelaide of Savoy- Genoa( Maria Adelaide Vittoria Amelia; 25 April 1904 – 2 August 1979), was a daughter of Prince Thomas, Duke of Genoa and Princess Isabella of Bavaria.
Yolande Louise of Savoy
Yolande Louise of Savoy( 1487–1499), was a Duchess Consort of Savoy; married to Philibert II, Duke of Savoy.
Margherita, Archduchess of Austria-Este
Margherita, Dowager Archduchess of Austria- Este(" née" Princess Margherita of Savoy- Aosta; born 7 April 1930) is the first- born child of the late Amedeo, 3rd Duke of Aosta, and Princess Anne d' Orléans.

Question: Who is the maternal grandfather of Princess Maria Bona Of Savoy-Genoa?
Answer: Prince Adalbert of Bavaria