Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Pyotr Nikolayevich Gruzinsky
Prince Pyotr Nikolayevich Gruzinsky (literally "Peter of Georgia"; 1837–1892) was a Georgian royal prince ("batonishvili") from the House of Mukhrani of the royal Bagrationi dynasty.
Pyotr painted landscapes and genre paintings, and was also known for his paintings of battle scenes from the Caucasus War.
He was the son of Prince Nikoloz Gruzinsky and a scion of the Mukhrani-Gruzinsky branch of the Bagrationi dynasty that had moved to Imperial Russia in the 18th century.
Pyotr Nikolayevich Gruzinsky was the last direct male descendant of King Vakhtang VI of Kartli and the last in the Gruzinsky line.
Henry Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.
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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Nikoloz Gruzinsky
Prince Nikoloz Iakobis Dze Bagration-Gruzinsky
(1783-1861) was a Georgian royal prince ("batonishvili") of Bagrationi dynasty.
He was the son of Iakob Gruzinsky.
In 1812-1823, he served as Valet de chambre.
Prince Iakob had 4 children:
He was buried at Vagankovo Cemetery in Moscow.
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.
Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.
He was the grandfather of Emperor Yōzei.

Question: Who is Pyotr Nikolayevich Gruzinsky's paternal grandfather?
Answer: Iakob Gruzinsky