Cognomen Koponen (Koponen 
, Копонен 
) , in the entire world, is quite a common last name. The last name Koponen is habitual in Northern Europe, particularly Finland, where it is a common surname, Estonia, where it is quite a rare surname, and Sweden. In absolute terms, it is commonest in Finland, the United States, and Sweden.
| VARIANT | COUNTRY |
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| Koponen | United Kingdom, Sweden, Finland, United States, Estonia |
| Копонен | Ukraine, Russia |
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antti koponen FI (b. 1882) |
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erkki koponen Finnish painter and sprinter (1899-1996), FI (b. 1899) |
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aulis koponen Finnish footballer (1906-1978), FI (b. 1906) |
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| albin koponen FI (b. 1858) |
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niilo koponen American politician and teacher (1928-2013), US (b. 1928) |
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| albin koponen Finnish politician (1881-1944), FI (b. 1881) |
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| elsa koponen Finnish teacher, FI (b. 1885) |
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| juhana semuli valdemer koponen (b. 1882) |
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| taavi koponen FI (b. 1895) |
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| aarne koponen FI (b. 1896) |
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| inari koponen Finnish film actor and stage actor (1913-1987), FI (b. 1913) |
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mervi koponen Finnish singer, FI (b. 1976) |
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| matti koponen FI (b. 1917) |
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noora koponen Finnish politician, FI (b. 1983) |
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marlo koponen Finnish ice hockey defenceman, FI (b. 1986) |
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