Bárid mac Ímair
Bárid mac Ímair (also referred to as Barith, Baraid, and Bard; or "Bárǫðr"; d. 881) was a ninth-century King of Dublin.
He was a son of Ímar and a member of the Uí Ímair.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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
Colla mac Báirid
Colla mac Báirid or Colla ua Báirid ((possibly), died 932) was a Viking leader who ruled Limerick in the early 10th century.
He first appears in contemporary annals in 924 when he is recorded as leading a raiding fleet to Lough Ree.
He appears in the annals for the second and final time in 932 when his death his recorded.
In both of these instances he is titled king of Limerick.
Colla's parentage is uncertain; according to one theory he was the son or grandson of Bárid mac Ímair, a Uí Ímair king of Dublin, and according to another he was the son of Bárid mac Oitir.
Muirgius mac Tommaltach
Muirgius mac Tommaltach was King of Connacht( 796-815).
He was preceded by Colla mac Fergus and superseded by Mael Cothaid.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
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.
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.
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 Colla Mac Báirid's paternal grandfather?
Answer: Ímar