John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Zara Yaqob
Zar'a Ya`qob or Zera Yacob
(Ge'ez ዘርአ:ያዕቆብ "zar'ā yāʿiqōb", English: "Descendant of Jacob"; 1399 – 26 August 1468) was the Emperor ("nəgusä nägäst") of Ethiopia, and a member of the Solomonic dynasty who ruled under regnal name Kwestantinos
I (Ge'ez ቈስታንቲኖስ "qʷastāntīnōs") or Constantine I, from the old province of Shewa, where the capital of the Amhara emperors was located before the post-16th-century Oromo migrations and the destructive war with Gran Ahmad.
Born at Telq in the province of Fatajar (now part of the Oromia Region, near the Awash River), Zara Yaqob was the youngest son of Dawit I and his youngest wife, Igzi Kebra.
The British expert on Ethiopia, Edward Ullendorff, stated that Zara Yaqob "was unquestionably the greatest ruler Ethiopia had seen since Ezana, during the heyday of Aksumite power, and none of his successors on the throne – excepted only the emperors Menelik II and Haile Selassie – can be compared to him."
Paul B. Henze repeats the tradition that the jealousy of his older brother Tewodros I forced the courtiers to take Zara Yaqob to Tigray where he was brought up in secret, and educated in Axum and at the monastery of Debre Abbay.
While admitting that this tradition "is invaluable as providing a religious background for Zar'a-Ya'iqob's career", Taddesse Tamrat dismisses this story as "very improbable in its details.
" The professor notes that Zara Yaqob wrote in his "Mashafa Berhan" that "he was brought down from the royal prison of Mount Gishan only on the eve of his accession to the throne."
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.
Dawit I
Dawit I (Ge'ez: , "David") was Emperor  (1382 – 6 October 1413) of Ethiopia, and a member of the Solomonic dynasty.
He was the younger son of Newaya Krestos.
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.

Question: Who is Zara Yaqob's paternal grandfather?
Answer: Newaya Krestos