Cognomen Vilhelmsen (Vilhelmsen 
, 威廉姆森) , around the world, is quite a rare family name. The surname Vilhelmsen is characteristic of Northern Europe, particularly Denmark, where it is quite a common surname, Norway, where it is quite a rare surname, and Latvia, where it is a rare surname. In absolute terms, it is the most numerous in Northern Europe, particularly Denmark, Norway, and Sweden.
| VARIANT | COUNTRY |
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| Vilhelmsen | Denmark, Norway, Sweden, United States, Latvia |
Wilhelmsen, and Вилхелмсен
| vilhelm kristoffer vilhelmsen Norwegian priest (b. 1890) |
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annette vilhelmsen Danish politician, DK (b. 1959) |
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| john vilhelmsen Danish rower, DK (b. 1934) |
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jens vilhelmsen Danish rower, DK (b. 1985) |
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| lars vilhelmsen researcher |
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| lars vilhelmsen entomologist |
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| troels n. vilhelmsen researcher, ORCID id # 0000-0002-6399-8563 |
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| frederik vilhelmsen researcher (ORCID 0000-0002-3958-5937) |
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| tore vilhelmsen badminton player (b. 1984) |
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| line vilhelmsen Danish association football player (b. 1989) |
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| ronnie vilhelmsen |
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