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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.
Karijotas
Karijotas or Koriat (baptized "Michal"; died between 1358 and 1363)
was the Duke of Navahrudak  and Vaŭkavysk , one of the sons of Gediminas, Grand Duke of Lithuania.
According to Polish historian Jan Tęgowski, he was born probably between 1305 and 1308.
He was baptized before 1349.
In 1349 Algirdas sent him along with two sons, Aikštas or Eikšis from Eišiškės and Simeon from Svislach, to Jani Beg, Khan of the Golden Horde, to negotiate an alliance against the Teutonic Knights and rising Grand Duchy of Moscow.
However, Jani Beg handed Karijotas over to Simeon of Russia for a ransom.
Fyodor Koriatovych
Fedir Koriatovych  (died 1414 in Mukacheve) was a Lithuanian prince of Gediminid dynasty, active in Ruthenia, son of Karijotas, Duke of Navahrudak.
Fedir inherited Navahrudak Castle from his father.
After Grand Duchy of Lithuania gained Podolia as a result of the decisive victory against the Golden Horde at the Battle of Blue Waters in 1362, he with his three brothers were appointed by Grand Duke Algirdas to administrate the region.
After the last of his brothers died circa 1389, he remained the sole administrator of Podolia for three years until his exile by the Grand Duke Vytautas the Great.
In 1392 he disobeyed Vytautas the Great and was forced into exile.
In 1396, Koriatovych purchased the city of Munkács in the Kingdom of Hungary (today Mukacheve, Ukraine), settling himself in the city's Palanok Castle, which would become one of the most protected castles in the region.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.

Question: Who is Fyodor Koriatovych's paternal grandfather?