Gwenllian of Wales
Gwenllian of Wales or Gwenllian ferch Llywelyn (June 1282 – 7 June 1337) was the only child of Llywelyn ap Gruffudd, the last native Prince of Wales .
She is sometimes confused with Gwenllian ferch Gruffudd, who lived two centuries earlier.
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.
D. Huw Owen
D. Huw Owen is a Welsh academic who is the former keeper of pictures and maps at the National Library of Wales and an historian of Wales.
Llywelyn ap Gruffudd
Llywelyn ap Gruffydd (c. 1223 – 11 December 1282), sometimes written as Llywelyn ap Gruffudd, also known as Llywelyn the Last or Llywelyn Yr Ail (Llywelyn II) , was Prince of Wales  from 1258 until his death at Cilmeri in 1282.
The son of Gruffydd ap Llywelyn Fawr and grandson of Llywelyn the Great, he was the last sovereign prince of Wales before its conquest by Edward I of England.
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.
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.
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.
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

Question: Who is Gwenllian Of Wales's paternal grandfather?
Answer: Gruffydd ap Llywelyn Fawr