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).
Kujō Hisatada
, son of Nijō Harutaka, was a "kuge" or Japanese court noble of the Edo period (1603–1868).
He was adopted by his brother Suketsugu as his son.
He held a regent position kampaku from 1856 to 1862, and retired in 1863, becoming a priest.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.
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.
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.
Kujō Michitaka
, son of regent Kujō Hisatada and adopted son of his brother, Kujō Yukitsune, was a "kuge" or Japanese court noble of the late Edo period and politician of the early Meiji era who served as a member of the House of Peers.
One of his daughters, Sadako married Emperor Taishō.
In the bakumatsu period, Kujō supported the Shogunate policy as one of highest courtier of the imperial court and hence lost the power at the very beginning of Meiji restoration when the annihilation of the Shogunate was announced on 1868-01-03.
His right to show at the imperial court was halted.
Soon later in the same year he was rehabilitated and appointed of the clan master of Fujiwara clan.
During the Boshin War, he had nominal leadership of the imperial army's Northern Pacification Command (奥羽鎮撫総督府), and spent the latter part of the war in northern Japan.
He was elevated to princedom in 1869 as the family head of Kujō family, when the Meiji government found "Kazoku" peerage system.

Question: Who is Kujō Michitaka's paternal grandfather?
Answer: Nijō Harutaka