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
Berthold of Chiemsee
Berthold of Chiemsee( 1465 – 19 July 1543) was a German bishop and theological writer.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Irmgard of Chiemsee
Blessed Irmgard of Chiemsee (also "Irmengard"; – 16 July 866), a member of the Carolingian dynasty, was the second daughter of King Louis the German and his wife Hemma.
She was the first Abbess of Frauenchiemsee from 857 until her 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.
Hemma
Emma of Altdorf, also known as Hemma (– 31 January 876), a member of the Elder House of Welf, was Queen consort of East Francia by marriage to King Louis the German, from 843 until her death.
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.
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.

Question: Who is the maternal grandfather of Irmgard Of Chiemsee?
Answer: Welf