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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Zhao Shoushan
Zhao Shoushan( 12 November 1894 – 20 June 1965) was a KMT general and later Chinese Communist Party politician.
He is the grandfather of Zhao Leji.
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
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Peter Schermerhorn
Peter Schermerhorn( October 1, 1749 – January 28, 1826) was a wealthy New York City merchant and land owner.
He was the father of Abraham Schermerhorn and the grandfather of Caroline Schermerhorn Astor.
Princess Caroline Napoléon
Princess Caroline Marie Constance Napoléon (born 24 October 1980) is a member of the House of Bonaparte, which reigned as Emperors of the French twice during the 19th century.
She is the first child and eldest daughter of Prince Charles Napoléon and his first wife, Princess Béatrice of Bourbon-Two Sicilies.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Princess Béatrice of Bourbon-Two Sicilies
Princess Béatrice Marie Caroline Louise Françoise of Bourbon-Two Sicilies (born 16 June 1950 in Saint-Raphaël, Var, France) is the eldest daughter of Prince Ferdinand, Duke of Castro, Castro-line claimant to the headship of the House of Bourbon-Two Sicilies, and his wife, Chantal de Chevron-Villette.
Her younger brother, Prince Carlo, Duke of Castro, is the current Castro-line claimant to the headship of the House of Bourbon-Two Sicilies.
Since 2014, Béatrice has served as Grand Chancellor of the Sacred Military Constantinian Order of Saint George.

Question: Who is the maternal grandfather of Princess Caroline Napoléon?
Answer: Prince Ferdinand, Duke of Castro