Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
Princess Maria Elisabeth of Bavaria
Princess Maria Elisabeth of Bavaria( 9 September 1914 – 13 May 2011) was the eldest daughter of Prince Franz of Bavaria, third son of Ludwig III of Bavaria.
William of Bavaria-Munich
William of Bavaria- Munich( 1435 – 1435) was a German nobleman.
He was the son of Margaret of Cleves and her first husband William III, Duke of Bavaria.
He was born after his father ’s death and died in infancy, being buried in the church of the Carmelites in Straubing.
His elder brother Adolf nominally ruled as duke alongside his uncle Ernest and his cousin Albert III until he died at age seven.
Margaret Paleologa
Margaret Palaeologa( 11 August 1510 in Casale Monferrato – 28 December 1566 in Mantua), was an Italian ruler; ruling Marchioness of Montferrat in 1533- 1536.
She was also Duchess of Mantua by marriage to Federico II, Duke of Mantua.
Margaret was the regent of Mantua as the guardian of her two sons from 1540 until 1556 in companionship with her brother- in- law.
Albert III, Duke of Bavaria
Albert III the Pious of Bavaria-Munich (27 March 1401 – 29 February 1460), since 1438 Duke of Bavaria-Munich.
He was born in Wolfratshausen to Ernest, Duke of Bavaria and Elisabetta Visconti, daughter of Bernabò Visconti.
Margaret of Bavaria, Marchioness of Mantua
Margaret of Bavaria (1442–1479), was a Marchioness consort of Mantua, married in 1463 to Federico I Gonzaga, Marquess of Mantua.
She was the daughter of Albert III, Duke of Bavaria and Anna of Brunswick-Grubenhagen-Einbeck.
The marriage between Margaret and Frederico helped trading relations between the two states.
Margaret was hunch-backed and was not able to speak or read Italian when she arrived, but the relationship with Frederico was described as happy.
The court was dominated by her mother-in-law, but Margaret avoided all conflicts.
During his war against Aragon, Frederico appointed Margaret as regent in his absence during the spring and summer of 1479.
She died during her reign.
Giuseppe Maria Bozzi
Giuseppe Maria Bozzi (6 January 1772 - 14 December 1833) was an Italian priest who became Bishop of Mantua, based in the city of Mantua, Italy.
Margaret of Brieg
Margaret of Brieg( 1342–1386) was a daughter of Ludwik I the Fair and his wife, Agnes of Sagan.
She was Duchess consort of Bavaria by her marriage to Albert I, Duke of Bavaria.
Albrecht, Duke of Bavaria
Albrecht, Duke of Bavaria( Albrecht Luitpold Ferdinand Michael; 3 May 1905 – 8 July 1996) was the son of the last crown prince of Bavaria, Rupprecht, and his first wife, Duchess Marie Gabrielle in Bavaria.
He was the only child from that marriage that reached adulthood.
His paternal grandfather was Ludwig III of Bavaria, the last king of Bavaria, who was deposed in 1918.
Margaret of Bavaria, Electress Palatine
Margaret of Bavaria (7 November 1456 – 25 January 1501) was a princess of Bavaria-Landshut and by marriage Princess of the Palatinate.

Question: Who is the paternal grandfather of Margaret Of Bavaria, Marchioness Of Mantua?
Answer: Ernest, Duke of Bavaria