Thomsen is a Danish patronymic surname meaning "son of Tom (or Thomas)", itself derived from the Aramaic תום or Tôm, meaning "twin". There are many varied surname spellings, with the first historical record believed to be found in 1252. Thomsen is uncommon as a given name.
People with the surname Thomsen include:
Britta Thomsen (born 1954), Danish politician and member of the European ParliamentCecilie Thomsen (born 1974), Danish actress and modelChristian Jürgensen Thomsen (1788–1865), Danish archaeologistClaus Thomsen (born 1970), Danish former professional footballerEbba Thomsen (1887–1973), Danish actressFinn Thomsen (born 1955), Danish motorcycle speedway riderFred Thomsen (1897–1986), American college football player and coachGrímur Thomsen (1820–1896), Icelandic poet and editorGrover C. Thomsen, Danish-American chemist who created the soft drink Big Red (drink) in 1937Gunnar H. Thomsen, Faroese musician and member of Týr (band), a Faroese heavy metal band active 1998–presentHans Peter Jørgen Julius Thomsen (1826–1909), Danish chemist noted in thermochemistry for the Thomsen–Berthelot principleHasse Thomsén (1942–2004), Swedish heavyweight boxerIb Thomsen (born 1961), Norwegian politicianIris Thomsen (born 1987), Danish dancerKnud Vad Thomsen (1905–1971) Danish composerLinda Chatman Thomsen (born 1954), American lawyer and public servantLynn Thomsen (born 1964), former American football playerMads Thomsen (born 1989), Danish former professional football forwardMark A. Thomsen (born 1956), American operatic tenorMarlene Thomsen (born 1971), Danish former badminton playerMartha Thomsen (born 1957), American modelMartinus Thomsen (1890–1981), Danish writer and mysticMoritz Thomsen (1915–1991), American farmer and writerPhilipp Thomsen, a perpetually drunken Kriegsmarine submarine commander in the book and film Das BootPoul Mathias Thomsen, Danish economist working for the International Monetary FundSøren Ulrik Thomsen (born 1956), Danish poetStu Thomsen (born 1958), American former bicycle motocross (BMX) racerSven Thomsen (1884–1968), Danish competitive sailorTina Thomsen (born 1975), Danish-born Australian actressTue Bjørn Thomsen (1972–2006), Danish professional boxerUlrich Thomsen (born 1963), Danish actorVern Thomsen, American college football coach, 1983–1987Vilhelm Thomsen (1842–1927), Danish linguist