Surname Truelsen (Truelsen 
) , throughout the world, is quite a rare last name. The cognomen Truelsen is characteristic of Denmark, where it is quite a common surname, Sweden, where it is a rare surname, and Germany. Not in comparison with a country's population, it is commonest in Denmark, the United States, and Germany.
| william truelsen (b. 1865) |
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| mogens truelsen Danish sprinter, DK (b. 1901) |
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| svend truelsen American officer (1915-1997) (b. 1915) |
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| niels frithiof truelsen Danish architect, DK (b. 1938) |
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| kristian truelsen American actor, US (b. 1954) |
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| sigurd friis truelsen researcher (ORCID 0000-0003-2410-5184) |
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| thomas truelsen researcher |
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| thomas clement truelsen researcher |
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| jimi lee truelsen Ph. D. Aarhus University 2009 |
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| jon truelsen |
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| truels andersen truelsen |
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