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.
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.
Erik the Red
Erik Thorvaldsson (950 – 1003), known as Erik the Red, was a Norse explorer, described in medieval and Icelandic saga sources as having founded the first settlement in Greenland.
According to Icelandic sagas, he was born in the Jæren district of Rogaland, Norway, as the son of Thorvald Asvaldsson.
He therefore also appears, patronymically, as Erik Thorvaldsson.
The appellation "the Red" most likely refers to the color of his hair and beard.
Icelandic explorer Leif Erikson was Erik's son.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Thorvald Eiriksson
Thorvald Eiriksson  was the son of Erik the Red and brother of Leif Erikson.
The only Medieval Period source material available regarding Thorvald Eiriksson are the two "Vinland sagas"; the "Greenland Saga" and the "Saga of Erik the Red".
Although differing in various detail, according to both sagas
Thorvald was part of an expedition for the exploration of Vinland and became the first European to die in North America.
The "Greenland Saga" describes a voyage made by Bjarni Herjolfsson, and the subsequent voyages of Leif Eriksson, his brother Thorvald Eiriksson, his sister Freydís Eiríksdóttir, and the Icelandic merchant Thorfinn Karsefni.
The Saga describes hostilities with skraelings, the Norse term for the native peoples they met in the lands visited south and west of Greenland which they called Vinland and Markland.
The "Saga of Erik the Red" tells the story as a single expedition led by Thorfinn Karsefni.
The voyage of Thorvald Eriksson is told here as part of the Karsefni expedition.
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.
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.
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 Thorvald Eiriksson's paternal grandfather?
Answer: Thorvald Asvaldsson