Last name Lehtonen (Кари 
, Lehtonen 
) , in all the world, is a common cognomen. The cognomen Lehtonen 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. Much less frequently, Lehtonen is the forename as well as the last name.
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| Кари | Bulgaria, Kyrgyzstan, Russia, Kazakhstan, Armenia |
| Lehtonen | Sweden, Finland, United States, Australia, Estonia |
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joel lehtonen Finnish writer, translator, critic and journalist (1881-1934), FI (b. 1881) |
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oskari lehtonen Finnish politician, FI (b. 1889) |
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aleksi lehtonen Finnish bishop (1891-1951), FI (b. 1891) |
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eero lehtonen athletics competitor (1898-1959), FI (b. 1898) |
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| frans lehtonen Finnish politician, FI (b. 1859) |
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aatos lehtonen Finnish association football player, handball player, bandy player and basketball player (1914-2005), FI (b. 1914) |
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| k. v. lehtonen (b. 1859) |
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kaarlo lehtonen Finnish soldier (1920-1977), FI (b. 1920) |
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| matti lehtonen (b. 1868) |
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| anni lehtonen FI (b. 1868) |
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kyösti lehtonen Olympic wrestler (1931-1987), FI (b. 1931) |
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| j. v. lehtonen Finnish literary scholar and professor, FI (b. 1883) |
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| k. f. lehtonen Finnish politician, FI (b. 1883) |
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| väinö lehtonen Finnish politician, FI (b. 1883) |
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| väinö lehtonen Finnish photographer, FI (b. 1884) |
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