Classen or Claßen is a Germanic patronymic surname, a variant of Klassen, derived from the name Klas, variant of Klaus, a diminutive of Niklaus.Classen Notable people with the surname include:

Aimée Classen, American ecologist Alexander Classen (1843–1934), German chemist Andy Classen, German musician, sound engineer and record producer Barbara Claßen (1957–1990), German judoka Bianca Claßen (born 1993), German fashion and beauty YouTuber Carl Joachim Classen (1928–2013), German classical scholar Chad Classen (born 1997), South African cricketer Edmond Classen (1938–2014), Dutch actor Erin Classen (born 2004), Australian squash player Gertrud Classen (1905–1974), German resistance activist Greg Classen (born 1977), German-Canadian ice hockey player J. Bart Classen, American immunologist and opponent of vaccination Johan Frederik Classen (1725–1792), Danish-Norwegian industrialist, major general and landowner Johannes Classen (1805–1891), German educator and classical philologist Llewellyn Classen, South African cricketer Maja Classen (born 1974), German film director and screenwriter Peter Hersleb Classen (1738–1825), Norwegian-Danish statesman Robin Classen (born 1991), German politician (AfD) Sabina Classen (born 1963), German thrash metal singer

See also Claasen, surname Claassen, surname The Classen, residential high-rise in Oklahoma City Classen Library, public library in Denmark Classen Mansion, neoclassical manor house in Denmark Classen School of Advanced Studies Klassen, surname Klaasen, surname Klaassen, surname

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