Surname Clemmensen (Clemmensen 
, Клемменсен 
) , all around the world, is quite a rare cognomen. The surname Clemmensen is characteristic of Northern Europe, particularly Denmark, where it is quite a common surname, Sweden, where it is a rare surname, and Norway. In absolute terms, it is the most numerous in Denmark, the United States, and Canada.
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| Clemmensen | Germany, Australia, United States, Canada, Denmark |
| Клемменсен | Ukraine |
Clemensen, Clementsen, Clementson, Klementsen, Klemetsen, and Klemetson
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andreas clemmensen Danish architect (1852-1928), DE (b. 1852) |
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| jens kolbæk clemmensen (b. 1822) |
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| c. a. clemmensen Danish journalist (b. 1869) |
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| erik christian clemmensen Danish American chemist (1876-1941), US (b. 1876) |
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| augusta thejll clemmensen Danish painter (1884-1980), DK (b. 1884) |
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| mogens clemmensen Danish architect (1885-1943), DK (b. 1885) |
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| ejgil clemmensen Danish coxswain, DK (b. 1890) |
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| niels clemmensen Danish musician (1900-1950), DK (b. 1900) |
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| carl henrik clemmensen Danish editor and murder victim, DK (b. 1901) |
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| tove clemmensen Danish art historian and museum curator (1915-2006), DK (b. 1915) |
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| karen clemmensen architect, designer (b. 1917) |
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| ebbe clemmensen Danish architect (1917-2003) (b. 1917) |
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| erik haunstrup clemmensen Danish politician (1920-2009), DK (b. 1920) |
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| poul clemmensen actor (1922-1998), DK (b. 1922) |
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scott clemmensen American ice hockey goaltender, US (b. 1977) |
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