Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.
Nicomedes III of Bithynia
Nicomedes III Euergetes (the Benefactor) was the king of Bithynia, from c. 127 BC to c. 94 BC.
He was the son and successor of Nicomedes II of Bithynia by an unnamed woman.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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.
Socrates Chrestus
Socrates Chrestus ("Chrestus" (The Good) died 90–88 BC) was the second son of Nicomedes III of Bithynia.
He usurped the Bithynian throne by deposing his elder brother or half brother, Nicomedes IV of Bithynia.
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).
Antisthenes
Antisthenes( c. 445 c. 365 BC) was a Greek philosopher and a pupil of Socrates.
Antisthenes first learned rhetoric under Gorgias before becoming an ardent disciple of Socrates.
He adopted and developed the ethical side of Socrates' teachings, advocating an ascetic life lived in accordance with virtue.
Later writers regarded him as the founder of Cynic philosophy.
Simmias of Thebes
Simmias of Thebes( fl. 5 th – 4th century BC) was an ancient Greek philosopher, disciple of Socrates, and a friend of Cebes.
In his" Memorabilia", Xenophon includes him in the inner circle of Socrates' followers.
He appears in Plato's" Phaedo" as a main discussion partner of Socrates alongside Cebes, as well as" CritoPhaedrus", and" Epistle XIII".

Question: Who is the paternal grandfather of Socrates Chrestus?
Answer: Nicomedes II of Bithynia