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.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Jehoram of Israel
Jehoram ("Yəhōrām"; also Joram) was a king of the northern Kingdom of Israel .
He was the son of Ahab and Jezebel, and brother to Ahaziah and Athaliah.
According to 2 Kings, , in the fifth year of Jehoram of Israel, (another) Jehoram became king of Judah.
The author of Kings speaks of both Jehoram of Israel and Jehoram of Judah in the same passage.
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.
Jezebel
Jezebel  was the daughter of Ithobaal I of Sidon and the wife of Ahab, King of Israel, according to the Book of Kings of the Hebrew Bible .
According to the Biblical narrative, Jezebel, along with her husband, instituted the worship of Baal and Asherah on a national scale.
In addition, she violently purged the prophets of Yahweh from Israel, damaging the reputation of the Omride dynasty.
For these offences, the Omride Dynasty was annihilated, with Jezebel herself suffering the gruesome death of defenestration.
In later Christian tradition, Jezebel was associated with false prophets.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.

Question: Who is the maternal grandfather of Jehoram Of Israel?
Answer: Ithobaal I