James Mor Stewart
James Mor Stewart, called James the Fat,  (c. 1400–1429 or 1449) was the youngest son of Murdoch Stewart, Duke of Albany and Isabella of Lennox.
When his father and brothers were executed by King James I for treason in 1425, James led a rebellion against the king, taking the town of Dumbarton and killing the keeper of Dumbarton Castle.
His success was short lived and he soon fled to Ireland, where he would spend the remainder of his life in exile.
A second attempt at rebellion in 1429 saw a fleet sail to Ireland to collect James "to convey him home that he might be king", but he died before the attempt could be made.
James's eldest son James "Beg" Stewart was able to secure a royal pardon and return to Scotland, and was the ancestor of the Stewarts of Ardvorlich on Lochearnside, whose family history is recounted by Sir Walter Scott in A Legend of Montrose.
James Mor's brother Walter (executed 1425) left a son, Andrew Stewart, 1st Lord Avondale, who became Lord Chancellor of Scotland in 1459, and was one of the leading servants of King James III of Scotland.
William Madison
William Madison( May 5, 1762 – July 20, 1843) was an American general.
He served in the War of 1812 and American Revolutionary War. Son of James Madison Sr. and Eleanor Rose Conway, he was the younger brother of James Madison, fourth President of the United States.
Madison married Frances Throckmorton and had eleven children.
He was the grandfather of Confederate Brigadier- General James E. Slaughter.
Murdoch Stewart, Duke of Albany
Murdoch Stewart, Duke of Albany  (136224 May 1425) was a leading Scottish nobleman, the son of Robert Stewart, Duke of Albany and the grandson of King Robert II of Scotland, who founded the Stewart dynasty.
In 1389, he became Justiciar North of the Forth.
In 1402, he was captured at the Battle of Homildon Hill and would spend 12 years in captivity in England.
After his father died in 1420, and while the future King James I of Scotland was himself held captive in England, Stewart served as Governor of Scotland until 1424, when James was finally ransomed and returned to Scotland.
However, in 1425, soon after James's coronation, Stewart was arrested, found guilty of treason, and executed, along with two of his sons.
His only surviving heir was James the Fat, who escaped to Antrim, Ireland, where he died in 1429.
Stewart's wife Isabella of Lennox survived the destruction of her family.
She lived to see the assassination of James I and the restoration of her title and estates.
James "Beg" Stewart
James" Beag" Stewart( c1424-1470) of Baldorran was the seventh illegitimate son of James Mor Stewart( known as" James the Fat"), who fled into exile in Ireland when his father Murdoch Stewart, Duke of Albany was executed for treason by James I of Scotland in 1425.
James the Fat would never return to Scotland, and he was unable to inherit the Albany estates, but James" Beag" Stewart was able to secure a royal pardon and return to Scotland.
He is the ancestor of the Stewarts of Ardvorlich on Lochearnside, whose family history is recounted by Sir Walter Scott in A Legend of Montrose.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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
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.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.

Question: Who is James Mor Stewart's paternal grandfather?
Answer: Robert Stewart