Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Zhao Shoushan
Zhao Shoushan( 12 November 1894 – 20 June 1965) was a KMT general and later Chinese Communist Party politician.
He is the grandfather of Zhao Leji.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Fínnachta
Fínnachta, son of Ollom Fotla, was, according to medieval Irish legend and historical tradition, a High King of Ireland in succession to his father.
His given name was Elim.
There is said to have been snow of wine (Old Irish "fínwinesnechtasnow") in his reign, from which he gained his better-known name.
He ruled for twenty years before dying of plague at Mag Inis in Ulster, and was succeeded by his brother Slánoll.
The chronology of Geoffrey Keating's "Foras Feasa ar Éirinn" dates his reign to 913–895 BC, that of the "Annals of the Four Masters" to 1278–1258 BC.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
Fíachu Findoilches
Fíachu Findoilches, son of Fínnachta, was, according to medieval Irish legend and historical tradition, a High King of Ireland.
He succeeded to the throne on the death of his uncle Géde Ollgothach, whom, according to some versions, he had killed.
His epithet "findoilches" means "white or fair hidden one", although some sources call him Fíachu Cendfinnán ("little white/fair head"), perhaps confusing him with the much earlier Fir Bolg king of that name.
It is said that all the cattle, or flowers, of Ireland had white heads in his reign, and that he exacted a tax on white-headed cattle.
He founded Kells, County Meath.
He is said to have been the first king in Ireland to dig wells, but grain did not stay on the stalk in his reign.
He ruled for either twenty or thirty years, and was killed by Géde Ollgothach's son Berngal in revenge for his father.
The chronology of Geoffrey Keating's "Foras Feasa ar Éirinn" dates his reign to 863–833 BC, that of the "Annals of the Four Masters" to 1231–1209 BC.
Fred Le Deux
Frederick" Fred" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).
He is the grandfather of Tom Hawkins.
John Mackay (poet)
John Mackay( 1656–1754), known as( The Blind Piper), was a Scottish Gaelic poet and composer, and the grandfather of William Ross.
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 Fíachu Findoilches's paternal grandfather?
Answer: Ollom Fotla