John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Thommo Reachea III
Thommo Reachea III or Sri Dharmaraja III, Chey Chettha VI (1690–1647), born Ang Tham, was a Cambodian king during Dark ages of Cambodia (r. 1702–1705, 1707–1714, 1736–1747).
Ang Tham was a son of Chey Chettha IV.
He ascended the throne in 1702.
He came into conflict with the vice king (uparaja)
Ang Em (Barom Ramadhipati), later, he drove out Ang Em with the help of Ayutthaya Kingdom.
Ang Em fled to Saigon in 1705, and sought help from Vietnamese Nguyễn lord.
Vietnamese army invaded Cambodia, Thommo Reachea III fled to Ayutthaya Kingdom.
With the help of Ayutthaya Kingdom, he captured Longvek.
The army of Ang Em was surrounded.
A Vietnamese army under Trần Thượng Xuyên and Nguyễn Cửu Phú (阮久富) was sent to Cambodia to help Ang Em.
Thommo Reachea III and Chey Chettha IV were defeated and fled to Ayutthaya Kingdom.
In 1736, Thommo Reachea III came back to Cambodia, and drove out the king Satha II.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Ang Em
Kaev Hua III or Barom Reameathiptei( 1674–1731), born Ang Em, was a Cambodian king during Dark ages of Cambodia( r. 1700– 1701, 1710 – 1722).
Ang Em was a son of vice king Ang Nan.
In 1700, a Vietnamese army under Nguyễn Hữu Cảnh invaded Cambodia, he was installed as the king by Vietnamese.
In the next year, Chey Chettha IV surrendered, and was allowed to restore.
Ang Em was deposed.
Chey Chettha IV abdicated in favour of Thommo Reachea III in 1702.
Chey Chettha IV married a daughter to Ang Em; this was a political marriage.
However, Thommo Reachea III drove out Ang Em with the help of Ayutthaya Kingdom.
Ang E m fled to Saigon in 1705, and sought help from Vietnamese Nguyễn lord.
He came back to Longvek with Vietnamese army.
In 1710, Ang E m ascended the throne.
In 1714, Thommo Reachea III captured Longvek with the help of Ayutthaya Kingdom.
Ang Em was in dangerous.
A Vietnamese army under Trần Thượng Xuyên and Nguyễn Cửu Phú( 阮久富) was sent to Cambodia to help Ang Em. Thommo Reachea III and Chey Chettha IV were defeated and fled to Ayutthaya Kingdom.
In 1722, Ang Em abdicated in favour of his son Satha II.
Ang Tong
Reameathiptei III( 1692–1757), born Ang Tong, was a Cambodian king during Dark ages of Cambodia( r. 1747–1749, 1756–1757).
Ang Tong was a son-in- law of Thommo Reachea III.
He struggled for power with Thommo Reachea IV and Ang Hing.
Later he killed Ang Hing and ascended the throne.
In 1749, Vietnamese army invaded Cambodia and installed Satha II.
Ang Tong fled to Ayutthaya Kingdom.
Ang Tong restored after Chey Chettha V's death.
He died in Purchat in 1757.
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.
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.
Thommo Reachea IV
Thommo Reachea
IV  (1706–1747), born Ang Em, was a Cambodian king during Dark ages of Cambodia (r. 1747).
Thommo Reachea IV was a son of Thommo Reachea III.
He ascended the throne after his father's death in 1747.
He struggled for power with his brother Ang Hing and brother-in-law Ang Tong.
In the same year he was murdered by Ang Hing; then Ang Hing was murdered by Ang Tong.

Question: Who is the paternal grandfather of Thommo Reachea Iv?
Answer: Chey Chettha IV