Cognomen Kleinschmidt (Kleinschmidt 
, Kleinsmith 
, Клейншмидт 
) , across the world, is a common surname. The last name Kleinschmidt is habitual in Greenland, where it is quite a common surname, Germany, where it is quite a rare surname, and Namibia. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and South Africa. Much less frequently, Kleinschmidt is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kleinschmidt | Germany, South Africa, United States, Poland, Brazil |
| Kleinsmith | Namibia, South Africa, Australia, United States, Canada |
| Клейншмидт | Kazakhstan, Russia, Ukraine |
| martin kleinschmidt (b. 1505) |
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| johannes kleinschmidt DE (b. 1536) |
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| vitus kleinschmidt (b. 1540) |
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johannes kleinschmidt DE (b. 1607) |
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| johann kleinschmidt DE (b. 1569) |
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| johann philipp kleinschmidt (b. 1577) |
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| johann kleinschmidt German university teacher, DE (b. 1593) |
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| johann kleinschmidt (b. 1601) |
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johann heinrich kleinschmidt DE (b. 1652) |
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| johann jakob kleinschmidt Died 30 September 1772, in Augsburg. German, Engraver (burin). Active in Augsburg., DE (b. 1687) |
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| philipp heinrich kleinschmidt (b. 1701) |
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franz heinrich kleinschmidt German missionary, DE (b. 1812) |
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samuel kleinschmidt German/Danish missionary, GL (b. 1814) |
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| konrad kleinschmidt person (1768-1832), DE (b. 1768) |
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theodor kleinschmidt German trader, explorer and naturalist, DE (b. 1834) |
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