Christopher H. Clark
Christopher Henderson Clark (1767 – November 21, 1828) was a congressman and lawyer from Virginia.
He was the brother of James Clark, the uncle of John Bullock Clark, Sr. and the great-uncle of John Bullock Clark, Jr..
Giuseppe Bonizzoni
Giuseppe Bonizzoni( 22 April 1908 – 21 July 1976) was an Italian professional footballer who played as a defender.
He was the uncle of former footballer and manager Luigi Bonizzoni.
Mark Twain
Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer.
He was lauded as the "greatest humorist this country has produced", and William Faulkner called him "the father of American literature".
His novels include "The Adventures of Tom Sawyer" (1876) and its sequel, the "Adventures of Huckleberry Finn" (1884), the latter often called "The Great American Novel".
Twain was raised in Hannibal, Missouri, which later provided the setting for "Tom Sawyer" and "Huckleberry Finn".
He served an apprenticeship with a printer and then worked as a typesetter, contributing articles to the newspaper of his older brother Orion Clemens.
He later became a riverboat pilot on the Mississippi River before heading west to join Orion in Nevada.
He referred humorously to his lack of success at mining, turning to journalism for the Virginia City "Territorial Enterprise".
His humorous story, "The Celebrated Jumping Frog of Calaveras County", was published in 1865, based on a story that he heard at Angels Hotel in Angels Camp, California, where he had spent some time as a miner.
The short story brought international attention and was even translated into French.
His wit and satire, in prose and in speech, earned praise from critics and peers, and he was a friend to presidents, artists, industrialists, and European royalty.
Twain earned a great deal of money from his writings and lectures, but he invested in ventures that lost most of it—such as the Paige Compositor, a mechanical typesetter that failed because of its complexity and imprecision.
He filed for bankruptcy in the wake of these financial setbacks, but he eventually overcame his financial troubles with the help of Henry Huttleston Rogers.
He eventually paid all his creditors in full, even though his bankruptcy relieved him of having to do so.
Twain was born shortly after an appearance of Halley's Comet, and he predicted that he would "go out with it" as well; he died the day after the comet returned.
Ivan Novoseltsev
Ivan Petrovich Novoseltsev( born January 23, 1979) is a Russian former professional ice hockey winger.
He is the uncle of Vladislav Namestnikov.
Hysen Hoxha
Hysen Efendi Hoxha( 1861–1934) was an Albanian politician, mayor of Gjirokastër, and the uncle of Enver Hoxha.
Bradley Orr
Bradley James Orr( born 1 November 1982) is an English retired footballer.
He is the uncle of Rangers defender Jon Flanagan.
Bonifazio Bevilacqua Aldobrandini
Bonifazio Bevilacqua Aldobrandini (1571 – April 7, 1627) was an Italian Cardinal.
He was the uncle of Pope Gregory XIV.
Jean Clemens
Jane Lampton
"Jean" Clemens (July 26, 1880 – December 24, 1909) was the youngest of three daughters born to Samuel Langhorne Clemens (better known by his pen name Mark Twain) and his wife Olivia Langdon Clemens.
She drowned in a bathtub at her father's home on Christmas Eve 1909 after an apparent seizure.
John Montgomery Glover
John Montgomery Glover( September 4, 1822 – November 15, 1891) was a North American politician, who served as a U.S. Representative from Missouri, he was the uncle of John Milton Glover.
Jo Schlesser
Joseph Schlesser (18 May 1928 – 7 July 1968) was a French Formula One and sports car racing driver.
He participated in three World Championship Grands Prix, including the 1968 French Grand Prix in which he was killed.
He scored no championship points.
He was the uncle of Jean-Louis Schlesser who himself became a Formula One driver in the 1980s.

Question: Who is the uncle of Jean Clemens?
Answer: Orion Clemens