Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.
He was the grandfather of Emperor Yōzei.
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 Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Prithvipati Shah
Prithvipati Shah( ?–1716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.
He was the grandfather of Nara Bhupal Shah.
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.
Walter Maule
Walter Maule was the son and heir of Sir Henry Maule, Baron of Panmure and Benvie, and Margaret, daughter of Sir William Hay of Locherworth.
He was warden of Kildrummy Castle in the reign of David II.
The name of Walter's spouse is unknown, but he left two sons, William and Henry.
William was named successor to the baronies of Panmure and Benvie on his father's death in 1348.
Henry Maule
Sir Henry Maule was the son and heir of Sir William Maule, Baron of Panmure and Benvie and Ethana de Vallibus, daughter of John Vaux, Lord of Dirleton.
William succeeded as Baron on his father's death and was married to Margaret Hay, daughter of Sir William Hay of Locherworth.
He was knighted by Robert I of Scotland for his services during the First War of Independence.
He left three sons: Walter, who succeeded him as Baron of Panmure and Benvie; William; Peter; and a daughter, Christian.

Question: Who is Walter Maule's paternal grandfather?
Answer: Sir William Maule