Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Margaret, Marchioness of Namur
Margaret, Marchioness of Namur( c. 1194 – 17 July 1270) was ruling Marchioness of Namur in 1229- 1237.
She was the daughter of Peter II of Courtenay and Yolanda of Flanders.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Peter I of Portugal
Peter I (Portuguese: "
Pedro I" (8 April 1320 – 18 January 1367), called the Just or the Cruel
(Portuguese: "o JustoO Cruel"), was King of Portugal from 1357 until his death.
He was the third but only surviving son of Afonso IV of Portugal and his wife, Beatrice of Castile.
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.
Maria of Portugal, Marchioness of Tortosa
Maria of Portugal (Évora, Kingdom of Portugal, 6 April 1342 – Aveiro, Kingdom of Portugal, after 1375) was a Portuguese "infanta" (princess), first daughter of King Peter I of Portugal and his Queen consort Constanza Manuel.
Maria was born in Évora on 6 April 1342.
In 1354, when she was only twelve years old, she married Fernando of Aragon, marquis of Tortosa, a marriage arranged by her grandfather, King Alfonso IV, to strengthen the alliance between the Kingdom of Portugal and the Crown of Aragon.
Fernando was the son of King Alfonso IV and of his second wife, Eleanor of Castile.
Fernando was murdered by his half-brother Peter IV of Aragon in 1363.
Maria then returned to Portugal where she died in the city of Aveiro after 1375.
She is buried in Monastery of Santa Clara-a-Velha in Coimbra.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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
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.

Question: Who is Maria Of Portugal, Marchioness Of Tortosa's paternal grandfather?
Answer: Afonso IV of Portugal