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.
Harald Bluetooth
Harald "Bluetooth" Gormsson (died c. 985/86) was a king of Denmark and Norway.
He was the son of King Gorm the Old and of Thyra Dannebod.
Harald ruled as king of Denmark from c. 958 – c. 986.
Harald introduced Christianity to Denmark and consolidated his rule over most of Jutland and Zealand.
Harald's rule as king of Norway following the assassination of King Harald Greycloak of Norway was more tenuous, most likely lasting for no more than a few years in the 970s.
Some sources say his son Sweyn Forkbeard forcibly deposed him from his Danish throne before his death.
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.
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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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
Gunhilde
Gunhilde (or Gunnhild) (died 13 November 1002) is said to have been the sister of Sweyn Forkbeard, King of Denmark, and the daughter of Harald Bluetooth.
She was married to Pallig, a Dane who served the King of England, Æthelred the Unready, as ealdorman of Devonshire.
She is supposed to have been a hostage in England when she was killed in the St. Brice's Day massacre, ordered by Æthelred.
Pallig is reported alternatively to have been killed in the massacre or to have provoked the massacre by deserting Æthelred's service.
Historians are divided about the strength of the evidence that she was Sweyn Forkbeard's sister.
Ryan Lavelle is sceptical of the reliability of the later medieval sources, such as the Chronicle of John of Wallingford, which mention her.
However, Frank Stenton described the claim as a "well recorded tradition", and considered that a desire to avenge her death was probably a principal motive for Sweyn's invasion of England in 1003, leading to the eventual conquest of England by his son Cnut.
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.

Question: Who is the paternal grandfather of Gunhilde?
Answer: Gorm the Old