Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Géde Ollgothach
Géde Ollgothach, son of Ollom Fotla, was, according to medieval Irish legend and historical tradition, a High King of Ireland.
He succeeded to the throne on the death of his brother Slánoll.
His epithet means "possessing a great voice", and the "Lebor Gabála Érenn" says during his reign all his subjects had voices as sweet as the strings of a zither.
He ruled for eight, or twelve, or seventeen years, before being killed by, according to the "Lebor Gabála", the otherwise unknown Fíachu son of Fíadchú; according to Geoffrey Keating and the "Annals of the Four Masters", by his nephew and successor Fíachu Findoilches, son of Fínnachta.
The chronology of Keating's "Foras Feasa ar Éirinn" dates his reign to 880–863 BC, that of the "Annals of the Four Masters" to 1241–1231 BC.
A medieval tract called "Cóir AnmannThe Fitness of Names") says that Géde Ollgothach was another name for Érimón.
Berngal
Berngal, son of Géde Ollgothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland.
He took power after killing his predecessor and cousin and his father's killer, Fíachu Findoilches.
He made so much war that there was a shortage of milk and corn - according to one version, only a sack and a half.
He ruled for either twenty-one or twelve years, until he was killed by his cousin Ailill, son of Slánoll.
The "Lebor Gabála Érenn" synchronises his reign with that of Deioces of the Medes (694–665 BC).
The chronology of Geoffrey Keating's "Foras Feasa ar Éirinn" dates his reign to 833–831 BC, that of the "Annals of the Four Masters" to 1209–1197 BC.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
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.
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.
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 Berngal's paternal grandfather?
Answer: Ollom Fotla