Clemens is both a Late Latin masculine given name and a surname meaning "merciful". Notable people with the name include:
Surname:
Andrew Clemens (b. 1852 or 1857–1894), American folk artist
Aurelius Prudentius Clemens, 4th century Roman poet
Barry Clemens (born 1943), American basketball player
Bert A. Clemens (1874-1935), American politician
Brian Clemens (born 1931), British screenwriter and television producer
Clayton Clemens, American Professor of Government
Dan Clemens (born 1945), American politician
George T. Clemens (1902–1992), American cinematographer
Harold W. Clemens (1918–1998), American politician
C. Herbert Clemens (born 1939), American mathematician
Isaac Clemens (1815–1880), Canadian farmer and politician
James Brackenridge Clemens (1825-1867), American entomologist
Jacob Clemens non Papa (c. 1510 to 1515–1555 or 1556), Franco-Flemish composer of the Renaissance
James Clemens, Lord Mayor of Liverpool 1775-6
James Clemens, pen name of author James Paul Czajkowski
James Clemens, Jr. (1791–1878), a US Senator
Jean Clemens (1880–1909), youngest daughter of Samuel Langhorne Clemens (Mark Twain)
Jeremiah Clemens (1814–1865), U.S. senator and novelist
Josef Clemens (born 1947), German bishop
Joseph Clemens (1862–1936), American missionary and plant collector
Joseph Clemens of Bavaria (1671–1723), German archbishop
Kellen Clemens (born 1983), American football player
Koby Clemens (born 1986), American baseball player
Marcus Arrecinus Clemens (disambiguation), multiple people
Martin Clemens, British World War II soldier and Solomon Islands coastwatcher
Mary Strong Clemens (1873–1968), American botanist and plant collector
Olivia Langdon Clemens (1845–1904), wife of Samuel Langhorne Clemens (Mark Twain)
Orion Clemens (1825–1897), brother of Samuel Langhorne Clemens (Mark Twain)
Paul Clemens (born 1988), American baseball player
Roger Clemens (born 1962), American baseball player
Samuel Langhorne Clemens, better known as Mark Twain (1835–1910), author
Sherrard Clemens (1820–1881), American politician and lawyer
Titus Flavius Clemens (consul), great-nephew of the Roman Emperor Vespasian and (as Flavius Clemens) a saint in the Greek Orthodox Church
William Clemens (film director) (1905–1980), American film director
Given name:
Clemens (rapper), (born 1979), real name Clemens Legolas Telling, Danish rapper, singer, music writer, actor
Clemens (impostor) (d. c. 15 AD), ancient Roman
Clemens Alexandrinus (Clement of Alexandria, c. 150 – c. 215), Christian theologian
Clemens Arnold (born 1978), German field hockey player
Clemens Baeumker (1853–1924), German historian of philosophy
Clemens Bollen (born 1948), German politician
Clemens Brentano (1778–1842), German poet and novelist
Clemens Denhardt (1852–1929), German explorer of Africa
Clemens Fritz (born 1980), German footballer
Arno Clemens Gaebelein (1861–1945), Methodist minister
Clemens Maria Hofbauer (1751–1820), patron saint of Vienna
Clemens Holzmeister (1886–1983), Austrian architect
Clemens Kalischer (born 1921), German-American photographer
Clemens Klotz (1886–1969), German architect
Clemens Krauss (1893–1954), Austrian conductor
Clemens August Graf von Galen (1878–1946), German count, Bishop of Münster, and Cardinal of the Roman Catholic Church
Clemens von Pirquet (1874–1929), Austrian scientist and pediatrician
Prince Clemens Wenceslaus of Saxony (1739–1812), German Archbishop
Clemens Westerhof (born 1940), Dutch football manager
Clemens Wilmenrod (1906–1967), German television cook
Clemens Winkler (1838–1904), German chemist
Fictional characters:
Dr. Jonathon Clemens, a character in the 1992 film Alien 3 played by the British Actor Charles Dance
See Cambridge Latin Course for Clemens, a fictional slave
