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.
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
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Fedlim Geancach Ó Conchobair
Fedlim Geancach Ó Conchobair (Feidhlimidh Gheangcaigh mac Toirdhealbhaigh Óig Ó Conchobhair Donn) (died 1475) was an Irish monarch of the fifteenth century.
He was one of the sons of Toirdhealbhach Óg Donn Ó Conchobair and King of Connacht from 1461–1475.
Fedlim Geancach Ó Conchobair succeeded to the throne of the Connachta in 1461 after the death of Aedh mac Tairdelbach Óg Ó Conchobair.
Fedlim was the last fully recognized monarch of The Kingdom of Connacht.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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.
Toirdhealbhach Óg Donn Ó Conchobair
Cathal mac Ruaidri Ó Conchobair (died 9 December 1406) was a King of Connacht and the son of Aedh mac Tairdelbach Ó Conchobair.
Few single members of the Ó Conchobair dynasty were able to assume overall control of the three main clan septs after the 1380s.
Toirdhealbhach was one of the very last of the kings, who were by now reduced to their ancestral lands in County Roscommon.

Question: Who is Fedlim Geancach Ó Conchobair's paternal grandfather?
Answer: Aedh mac Tairdelbach Ó Conchobair