Clausen
Clausen is a Danish patronymic surname, literally meaning child of Claus, Claus being a German form of the Greek Νικόλαος, Nikolaos, (cf. Nicholas), used in Denmark at least since the 16th century.Søndergaard, Georg (2000) Danske For- og Efternavne. Askholms Forlag. {{ISBN|87-90721-17-9}} The spelling variant Klausen has identical pronunciation (as does the often interchangeable Claussen).
The two variants are number 34 and 85 on the top 100 of surnames in Denmark.{{Cite web |url=http://www.danskernesnavne.navneforskning.ku.dk/Topnavne/Topnavn_reg10_s2_l.asp |title=University of Copenhagen - Name Research Section |access-date=2007-11-10 |archive-date=2009-07-03 |archive-url=https://web.archive.org/web/20090703191033/http://www.danskernesnavne.navneforskning.ku.dk/topnavne/topnavn_reg10_s2_l.asp |url-status=dead }} Occurrences of Clausen/Klausen as a surname outside Denmark and Schleswig-Holstein are due to immigration. Immigrants to English-speaking countries sometimes changed the spelling to Clauson.
People
- Alden W. Clausen, (1923–2013), American businessman and former President of the World Bank
- Alf Clausen (born 1941), American film and television musical composer
- Andrea Clausen (born 1959), German stage actress (Burgtheater, Vienna)
- Arne Clausen (born 1932), Argentine Methodist Pastor
- Casey Clausen (born 1981), American football player
- Christopher John Clausen (born 1942), American writer
- Claus Clausen (1899–1989), German film actor
- Claus Kristian Randolph Clausen (1869–1958), US Navy officer in Spanish–American War.
- Claus Lauritz Clausen (1820–1892), pioneer Lutheran minister, military chaplain and politician.
- Connie Clausen (1923–1997), US actress, author
- Curtis Paul Clausen (1893–1976), American entomologist
- Donald Holst Clausen (1923–2015), US politician
- Frits Clausen (1893–1947), the leader of the Danish Nazi Party before the Second World War
- George Clausen (1852–1944), British painter
- Henrik Nicolai Clausen (1793–1877), Danish theologian and statesman
- Henry Christian Clausen (1905–1993), American lawyer
- Herluf Stenholt Clausen (1921–2002), Danish ichthyologist
- Hermann Clausen (1885–1962), German politician
- Hugh Clausen OBE (1888–1972), British naval armaments engineer{{Cite web
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- Major General Hugh J. Clausen (1926–2009), Deputy Judge Advocate General of the United States Army{{Cite web
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- Ian Clausen, American philosopher
- Jens Clausen (1891–1969), a Danish-American botanist and geneticist
- Jimmy Clausen (born 1987), US football player
- John Adam Clausen (1914–1996), American sociologist
- John Henry Clausen (1852–1930), farmer[https://familysearch.org/tree/#view=ancestor&person=LZN8-TYN§ion=details John Henry Clausen]
- Jørgen Mads Clausen (born 1948), Danish industry magnate
- Kasper Klausen (born 1982), Danish footballer
- Kristoffer Clausen, Norwegian media personality
- Lars Clausen (1935–2010), German sociologist
- Luke Clausen, American fisherman
- Mads Clausen (1905–1966), Danish industrialist and father of Jørgen Mads Clausen
- Mads Clausen (footballer) (born 1984), Norwegian footballer
- Meredith Clausen (born 1942), American architectural historian and professor at University of Washington
- Néstor Clausen (born 1962), Argentine footballer
- Nicolai Clausen (1911–1943), German U-boat commander
- Peter Clausen (nineteenth century, dates unclear), also known as Pedro Cláudio Dinamarquez Clausen and as Peter Claussen, Danish natural history collector
- Pit Clausen (born 1962), German politician, mayor of city Bielefeld
- Raymond M. Clausen Jr. (1947–2004), United States Marine Corps, Medal of Honor recipient, Vietnam War 31 Jan 1970.
- René Clausen (born 1953), American composer
- Rick Clausen (born 1982), American football player
- Roy Elwood Clausen (1891–1956), American botanist and geneticist
- Sally Clausen (born 1945), American educational administrator
- Thomas Clausen (mathematician) (1801–1885), Danish mathematician and astronomer
- Thomas Clausen (musician) (born 1949), Danish jazz pianist
- Thomas Clausen (Louisiana) (1939–2002), American education superintendent, brother of Sally Clausen
- Sven Clausen (Danish author, playwright, doctor of law) (1893–1961)
Places
- Clausen, Luxembourg, a quarter in Luxembourg City
- Clausen, Germany, a town in Rhineland-Palatinate and site of a former US Army chemical weapons facility
Other
- Clausen function, a mathematical function