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.
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.
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.
Humphrey Sibthorp (1744–1815)
Humphrey Sibthorp (3 October 1744 – 25 April 1815) was a British Tory politician who sat in the House of Commons in two periods between 1777 and 1806.
Sibthorp was the eldest surviving son of the botanist Humphry Sibthorp and his first wife Sarah Waldo, daughter of Isaac Waldo of Streatham, Surrey.
He was educated at Harrow School in 1755 and Westminster School in 1756.
In 1758 he matriculated at Corpus Christi, Oxford on 24 May and was awarded BA in 1762 and MA in 1766.
He entered Lincoln's Inn in 1766 and was called to the bar in 1770.
At the 1774 general election, Sibthorp stood for Parliament at Lincoln and Newark, and was bottom of the poll in both constituencies.
He was elected as a Member of Parliament (MP) for Boston at a by-election on 3 May 1777, after the death of Charles Amcotts MP.
He was re-elected in 1780, but was defeated at the 1784 general election.
Sibthorp was elected as a Member of Parliament (MP) for Lincoln at a by-election on 9 April 1800, after the death of George Rawdon MP.
He was re-elected in 1802, but declined to stand 1806 general election, because of ill-health.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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.
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
Humphry Sibthorp (botanist)
Humphry Waldo Sibthorp (1713–1797) was a British botanist.
He was a younger son of John Sibthorpe, MP for Lincoln and Mary Browne, daughter of Humphrey Browne of Lincoln.
After the death of Johann Jacob Dillenius (1684–1747), he became the Sherardian Professor of Botany at the University of Oxford from 1747 to 1783.
He is known for having taught one course for 37 years.
He began the catalogue of the plants of the botanical garden of the university, "Catalogus Plantarum Horti Botanici Oxoniensis".
The genus "Sibthorpia", in the plantain family of plants is named after him.

Question: Who is the paternal grandfather of Humphrey Sibthorp (1744–1815)?