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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Demmán mac Cairell
Demmán mac Cairill( died 572) was a king of the Dál Fiatach, and over- king of Ulaid in Ireland.
He was the son of Cairell mac Muiredaig Muinderg( died 532), a previous Ulaid king and brother of Báetán mac Cairill( died 581).
He ruled the Dál Fiatach and Ulaid from 557 to 572.
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
Fiachnae mac Áedo Róin
Fiachnae mac Áedo Róin (died 789) was a Dál Fiatach ruler of the over-kingdom of Ulaid in Ireland.
He reigned from 750 to 789.
He was the son of Áed Róin (died 735) and brother of Bressal mac Áedo Róin (died 750), previous kings.
This family had their base in modern-day County Down, Northern Ireland.
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.
Cairell mac Fiachnai
Cairell mac Fiachnai (died 819) was a Dal Fiatach king of Ulaid, which is now Ulster, Ireland.
He was the son of Fiachnae mac Áedo Róin (died 789), a previous king.
He ruled from 810 to 819.
In 809 Cairell challenged his brother Eochaid mac Fiachnai for the throne and defeated him in battle.
This challenge had occurred after the high king Áed Oirdnide campaigned against Ulaid and ravaged from the Bann to Strangford Lough.
According to the annals Eochaid escaped from the battle and historians assign 810 as his death date.
Cairell became King of Ulaid as a result.
In 819 Muiredach mac Eochada (died 839) obtained revenge for his father by defeating and slaying Cairell in a skirmish in 819.
Viking raids had begun on Ireland (an island off the north Ulaid coast had been attacked in 795) and in 811 the annals record the slaughtering of a group of them by the Ulaid.
Cairell's descendants did not hold the kingship of Ulaid which instead descended through his brother Eochaid.
However, his descendants were prominent at the royal monastic center at Downpatrick.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.

Question: Who is the paternal grandfather of Cairell Mac Fiachnai?