Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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 Sultan
Ismihan Kaya Sultan (1633–1659) was an Ottoman princess.
She was the daughter of Ottoman sultan Murad IV.
She married the statesman Melek Ahmed Pasha in 1644 and died shortly after giving birth, at the age of 26, due to complications during her labour.
The famed Ottoman traveler Evliya Çelebi noted a specific encounter with Kaya Sultan in his "Book of Travels".
An entire chapter of the book is dedicated to Kaya Sultan, from her pregnancy to her death.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Murad IV
Murad IV ("Murād-ı Rābiʿ"; 26/27 July 1612 – 8 February 1640) was the Sultan of the Ottoman Empire from 1623 to 1640, known both for restoring the authority of the state and for the brutality of his methods.
Murad IV was born in Constantinople, the son of Sultan Ahmed I
(r. 1603–17) and Kösem Sultan.
He was brought to power by a palace conspiracy in 1623, and he succeeded his uncle
Mustafa I
(r. 1617–18, 1622–23).
He was only 11 when he ascended the throne.
His reign is most notable for the Ottoman–Safavid War (1623–39), of which the outcome would permanently part the Caucasus between the two Imperial powers for around two centuries, while it also roughly laid the foundation for the current Turkey–Iran–Iraq borders.
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.
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.
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.

Question: Who is Kaya Sultan's paternal grandfather?
Answer: Ahmed I