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.
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.
Petre Gruzinsky
Prince Petre Petres dze
Bagrationi Gruzinsky  (28 March 1920 – 13 August 1984) was a Georgian poet and Honored Artist of the Georgian SSR (1979).
He was a son of Prince Petre Bagration-Gruzinsky and a scion of King George XII of Georgia.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Petre Bagration-Gruzinsky
Petre Aleksandres dze Bagrationi Gruzinsky  (26 April 1857 – 3 February 1922) was a Georgian prince ("batonishvili"), a descendant of the Kakhetian branch (Gruzinsky) of the Bagrationi dynasty, the former royal house of Georgia.
Petre was the son of Prince Alexander Bagration-Gruzinsky.
Prince Petre married Princess Tamara Dekanozishvili (1897–1977) at the Navtlugi Church of St. Barbara in Tbilisi in 1915 and had two sons:
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.
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
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.

Question: Who is the paternal grandfather of Petre Gruzinsky?
Answer: Alexander Bagration-Gruzinsky