John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Eudokia Angelina
Eudokia Angelina (or Eudocia Angelina) (around 1173–died , or later) was the consort of Stefan the First-Crowned of Serbia from c. 1190 to c. 1200.
She later remarried, to Alexios V Doukas, who briefly ruled as Emperor of Byzantium in 1204.
She was a daughter of Alexios III Angelos and Euphrosyne Doukaina Kamatera.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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.
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
Euphrosyne Doukaina Kamatera
Euphrosyne Doukaina Kamaterina or better Kamatera (– 1211) was a Byzantine Empress by marriage to the Byzantine Emperor Alexios III Angelos.
Euphrosyne was the daughter of Andronikos Kamateros, a high-ranking official who held the titles of "megas droungarios" and "pansebastos" and wife, an unknown Kantakouzene.
She was related to the Emperor Constantine X and Irene Doukaina, empress of Alexios I Komnenos.
Both of her brothers had rebelled against Andronikos I Komnenos; one was imprisoned and the other was blinded.
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 the maternal grandfather of Eudokia Angelina?
Answer: Andronikos Kamateros