Family name Wilhelmsson (Wilhelmsson 
) , across the world, is quite a rare last name. The cognomen Wilhelmsson is characteristic of Northern Europe, particularly Sweden, where it is quite a common surname, Finland, where it is quite a rare surname, and Norway, where it is a rare surname. In absolute terms, this name is the most popular in Sweden, Finland, and Poland. Very seldom, Wilhelmsson is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wilhelmsson | Norway, Sweden, Finland, United States, Poland |
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gustaf walfrid wilhelmsson SE (b. 1860) |
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| john wilhelmsson Finnish writer, FI (b. 1869) |
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| erik wilhelmsson SE (b. 1894) |
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lars-åke wilhelmsson Swedish actor, SE (b. 1958) |
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putte wilhelmsson Finnish journalist, FI (b. 1962) |
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christian wilhelmsson Swedish footballer, SE (b. 1979) |
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| hans wilhelmsson Swedish academic, SE (b. 1929) |
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| åke wilhelmsson Swedish journalist, SE (b. 1933) |
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| lars wilhelmsson Swedish journalist, SE (b. 1934) |
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emma wilhelmsson Swedish association football player, SE (b. 1986) |
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| bertil wilhelmsson SE (b. 1926) |
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| hans wilhelmsson Swedish Olympic speed skater, SE (b. 1936) |
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tina wilhelmsson SE (b. 1977) |
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| thomas wilhelmsson Finnish professor, FI (b. 1949) |
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| ewa wilhelmsson Swedish actress, SE (b. 1949) |
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