Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
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
John Christian Kunkel
John Christian Kunkel (September 18, 1816 – October 14, 1870) was a Whig and Republican member of the U.S. House of Representatives from Pennsylvania.
He was the grandfather of John Crain Kunkel.
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.
Theodora Palaiologina Synadene
Theodora Palaiologina Synadene  was the daughter of Constantine Palaiologos and Irene Komnene Laskarina Branaina.
Through her father, she was a half-niece of the Byzantine Emperor Michael VIII Palaiologos.
John Synadenos (megas konostaulos)
John Komnenos Doukas Palaiologos Synadenos  was a Byzantine noble and military leader in the early 14th century, holding the court title of "megas konostaulos".
He was the son (possibly the eldest) of the "megas stratopedarches" John Synadenos, and brother of the "protostrator" Theodore Synadenos.
He inherited the surname "Palaiologos" from his mother, Theodora Palaiologina Synadene, and was commonly referred to by it.
He married a lady named Thomais, descended form the imperial dynasties of Laskaris and Palaiologos, although her exact parentage is unknown.
No children of his are known.
Very little is known about his life, except that he acted as an emissary of Andronikos III Palaiologos to his grandfather Andronikos II during the closing stages of the Byzantine civil war of 1321–1328, along with John Aplesphares.
Archibald Hope, Lord Rankeillor
Sir Archibald Hope, Lord Rankeillor (1639 – 10 October 1706) was a Scottish advocate and judge, the second son of John Hope, Lord Craighall, the grandfather of the botanist John Hope and the great-grandfather of the chemist Thomas Charles Hope, FRSE.
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).
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 John Synadenos (Megas Konostaulos)'s maternal grandfather?
Answer: Constantine Palaiologos