Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Mardanshah (Sasanian prince)
Mardanshah  was a 7th-century Sasanian prince.
He was the son of the Sasanian king (shah)
Khosrow II  and Shirin, and was the preferred successor of the Sasanian Empire
.
He was later killed along with his brothers and half-brothers by his half-brother Kavad II in 628.
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.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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).
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.
Khosrow II
Khosrow II (Chosroes II in classical sources; Middle Persian: "Husrō(y)"), also known as Khosrow Parviz (New Persian: , "Khosrow the Victorious") was the last great Sasanian king (shah) of Iran, ruling from 590 to 628, with an interruption of one year.
He was the son of Hormizd IV (reigned 579–590) and the grandson of Khosrow
I (reigned 531–579).
Khosrow II was the last king of Iran to have a lengthy reign before the Muslim conquest of Iran, which began five years after his execution.
He lost his throne, then recovered it with Roman help, and, a decade later, went on to emulate the feats of the Achaemenids, conquering the rich Roman provinces of the Middle East; much of his reign was spent in wars with the Byzantine Empire and struggling against usurpers such as Bahram Chobin and Vistahm.
During the climactic Byzantine–Sasanian War of 602–628, Khosrow expanded deep into western Asia Minor, eventually besieging the Byzantine capital of Constantinople in 626 alongside Avar and Slavic allies.
Following the failure of the siege, Heraclius started a counterattack, undoing all territorial gains by Khosrow in the Levant, most of Anatolia, the western Caucasus, and Egypt, eventually marching into the Sassanian capital of Ctesiphon.
The Byzantines also regained the True Cross, which Khosrow had captured following his conquest of the Levant during the same 602–628 war.
In works of Persian literature such as the "Shahnameh" and "Khosrow and Shirin", a famous tragic romance by Nizami Ganjavi (1141–1209), a highly elaborated fictional version of Khosrow's life made him one of the greatest heroes of the culture, as much as a lover as a king.
"Khosrow and Shirin" tells the story of his love for the Aramean or Roman princess Shirin, who becomes his queen after a lengthy courtship strewn with mishaps and difficulties.
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.

Question: Who is the paternal grandfather of Mardanshah (Sasanian Prince)?
Answer: Hormizd IV