Duke Siegfried August in Bavaria
Duke Siegfried in Bavaria, full German name:" Siegfried August Maximilian Maria, Herzog in Bayern"( 10 July 1876, Bamberg, Kingdom of Bavaria – 12 March 1952, Munich, Republik of Bavaria) was a Duke in Bavaria and member of the House of Wittelsbach.
Siegfried August was the first of three sons of Duke Maximilian Emanuel in Bavaria and his wife Princess Amalie of Saxe- Coburg and Gotha.
Siegfried August was the brother of" Christoph" Joseph Clemens Maria, Duke in Bavaria and" Luitpold" Emanuel Ludwig Maria, Duke in Bavaria.
Duke Pius August in Bavaria
Duke" Pius August" in Bavaria, full German name:" Pius August Herzog in Bayern"( born 1 August 1786 in Landshut, Electorate of Bavaria; died 3 August 1837 in Bayreuth, Kingdom of Bavaria) was a Duke in Bavaria as a member of the Palatine Birkenfeld- Gelnhausen line of the House of Wittelsbach.
Pius
August was a grandfather of Empress Elisabeth of Austria through his son Duke Maximilian Joseph in Bavaria, as well as a great grandfather of Queen Elisabeth of the Belgians and an ancestor of the current generations of the Belgian and Italian Royal Families and the Grand Ducal Family of Luxembourg.
Princess Amalie of Saxe-Coburg and Gotha
Princess Amalie of Saxe-Coburg and Gotha (Marie Luise Franziska Amalie; 23 October 1848 – 6 May 1894) was a Princess of Saxe-Coburg and Gotha by birth and a Duchess in Bavaria through her marriage to Duke Maximilian Emanuel in Bavaria.
Amalie was the fourth child and second eldest daughter of Prince August of Saxe-Coburg and Gotha and his wife Princess Clémentine of Orléans.
Her youngest brother was Ferdinand I of Bulgaria.
Duke Maximilian Joseph in Bavaria
Duke Maximilian Joseph in Bavaria (4 December 1808 – 15 November 1888), known informally as Max in Bayern, was a member of a junior branch of the House of Wittelsbach and a promoter of Bavarian folk-music.
He is most famous today as the father of Empress Elisabeth of Austria ("Sisi") and great-grandfather of King Leopold III of Belgium.
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.
Duke Maximilian Emanuel in Bavaria
Duke Maximilian Emanuel in Bavaria, full German name
: "Maximilian Emanuel, Herzog in Bayern" (7 December 1849 in Munich, Kingdom of Bavaria – 12 June 1893 in Feldafing, Kingdom of Bavaria) was a Duke in Bavaria and member of the House of Wittelsbach.
Maximilian Emanuel was the tenth and youngest child of Duke Maximilian Joseph in Bavaria and his wife Princess Ludovika of Bavaria.
Maximilian Emanuel was the brother of Elisabeth of Bavaria, Empress of Austria and Queen of Hungary.
Fred Le Deux
Frederick" Fred" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).
He is the grandfather of Tom Hawkins.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
Princess Ludovika of Bavaria
Princess Ludovika of Bavaria (Marie Ludovika Wilhelmine; "Mary Louise Wilhelmina"; 30 August 1808 – 25 January 1892) was the sixth child of King Maximilian I Joseph of Bavaria and his second wife, Karoline of Baden, and the mother of Empress Elisabeth of Austria.
She was born and died in Munich.
Duke Franz Joseph in Bavaria
Duke Franz Joseph in Bavaria, full German name:" Franz Joseph Michael Karl
Maria Evaristus Quirinus Ottokar Herzog in Bayern"( 23 March 1888, Schloss Tegernsee, Kingdom of Bavaria – 23 September 1912, Munich, Kingdom of Bavaria) was a Duke in Bavaria and member of the House of Wittelsbach.
Franz Joseph was the fifth and youngest child of Duke Karl- Theodor in Bavaria and his wife Infanta Maria Josepha of Portugal.
Franz Joseph was the brother of Duke Ludwig Wilhelm in Bavaria and sisters Duchess Amalie in Bavaria, Duchess Sophie Adelheid in Bavaria, Duchess Elisabeth in Bavaria and Duchess Marie Gabrielle in Bavaria.

Question: Who is the maternal grandfather of Duke Maximilian Emanuel In Bavaria?
Answer: Maximilian I Joseph of Bavaria