Auguste-Louis Petiet
Auguste- Louis Petiet( 19 July 1772 in Rennes – 1 August 1858) was a French brigadier general and a politician.
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.
Auguste-Louis-Albéric, prince d'Arenberg
Auguste Louis Albéric, Prince of Arenberg (15 September 1837 – 24 January 1924) was a French noble and monarchist politician, born in Paris.
Third son of Pierre d'Alcantara Charles Marie, duc d'Arenberg and Alix de Talleyrand-Périgord, he inherited his father's title because of his older brothers' premature deaths.
He was noted for his great wealth and extensive properties throughout France, in particular at Menetou-Salon (Cher).
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Prithvipati Shah
Prithvipati Shah( ?–1716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.
He was the grandfather of Nara Bhupal Shah.
Pierre d'Alcantara Charles
Pierre d'Alcantara Charles Marie, Prince d'Arenberg, duc d'Arenberg, (Paris 2 October 1790 – Brussels 27 September 1877)
Pierre d'Alcantara Charles, was born on 2 October 1790 as 3rd son of Louis Engelbert, 6th Duke of Arenberg.
He entered into the service of France.
He distinguished himself during the campaigns in Spain and followed the Emperor Napoleon the Russian campaign, as an officer of ordinance.
Made a peer of France on 25 November 1827, he became a naturalized French subject by order of King Charles X, 28 February 1828.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Auguste Louis Antoine Fabre
Auguste Louis Antoine Fabre (13 April 1820 – 15 January 1878) was a French magistrate who was briefly a national deputy during the Second French Empire.

Question: Who is Auguste-Louis-Albéric, Prince D'Arenberg's paternal grandfather?
Answer: Louis Engelbert, 6th Duke of Arenberg