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.
Hedvig Elizabeth von Biron
Hedvig Elizabeth von Biron of Courland (1727–1797), was a princess of Courland and a Russian courtier, daughter of the Duke of Courland, Ernst Johann von Biron, and Benigna Gottlieb von
Trotha gt Treyden, and the sister of Peter von Biron.
She was the Ober-Hofmeisterin of the Empress Elizabeth of Russia and an influential person at the Russian court.
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
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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 Mackay (poet)
John Mackay( 1656–1754), known as( The Blind Piper), was a Scottish Gaelic poet and composer, and the grandfather of William Ross.
Yelizaveta Palmenbach
Yelizaveta Palmenbach (1761–1832) was an Imperial Russian pedagogue, the principal of the Smolny Institute in Saint Petersburg from 1797–1802.
She was the daughter of Baron Aleksandr Ivanovich Cherkasov and Hedvig Elizabeth von Biron (1727–1797), sister of Peter von Biron.
She was educated at the Smolny Institute, where she graduated in 1779, and was a lady-in-waiting prior to her marriage to Yevstafi Palmenbach in 1793, with whom she had three daughters.
In 1796, she became assistant director of Sophie Lafont, and replaced her as principal in 1797.
She was also the governess of the Grand Duchesses.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
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.

Question: Who is Yelizaveta Palmenbach's maternal grandfather?
Answer: Ernst Johann von Biron