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.
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.
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.
Junchen
Junchen (r. 161–126 BCE) was the son and successor to Laoshang Chanyu.
As chanyu of the Xiongnu Empire, Junchen outlived the Han emperors Wen (r. 180–157 BC), Jing (r. 157–141 BC).
He died during the reign of the Emperor Wu of Han (r. 141–87 BC).
All three Han emperors confirmed the "heqin" peace and kinship treaty with the Xiongnu.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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).
Laoshang
Laoshang (r. 174–161 BCE), whose proper name was Jiyu , was a Chanyu of the Xiongnu Empire who succeeded his father Modu Chanyu in 174 BCE.
Under his reign, the Xiongnu Empire continued to expand against the Yuezhi and the Xiongnu thus gained control of the Hexi Corridor.
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 Junchen's paternal grandfather?
Answer: Modu Chanyu