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.
Catherine Birgersdotter of Bjelbo
Catherine Birgersdotter of Bjelbo (fl. 1245–1289), was a Princess consort of Anhalt, married to Siegfried I, Prince of Anhalt-Zerbst.
She was the daughter of the Swedish regent Birger Jarl and Princess Ingeborg Eriksdotter of Sweden.
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.
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
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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Ingeborg Eriksdotter of Sweden
Ingeborg Eriksdotter (– 17 June 1254) was a Swedish princess and duchess, daughter of King Eric X of Sweden, eldest sibling of King Eric XI of Sweden, wife of Birger Jarl, and mother of Kings Valdemar and Magnus III of Sweden.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Sir Thomas Green
Sir Thomas Green( c.1461 – 9 November 1506) was a member of the English gentry who died in the Tower of London, where he had been imprisoned for treason.
He is best known as the grandfather of Catherine Parr, last wife of King Henry VIII.

Question: Who is the maternal grandfather of Catherine Birgersdotter Of Bjelbo?
Answer: Eric X of Sweden