Family name Kleinert (Kleinert 
, קליינרט 
, Кляйнерт 
) , around the world, is quite a common cognomen. The last name Kleinert is characteristic of Germany, where it is quite a rare surname, Slovakia, and Malta. Not in comparison with a country's population, the name is most common in Germany, the United States, and Brazil. Much less frequently, Kleinert is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kleinert | Brazil, Slovakia, United States, Germany, Poland |
| קליינרט | Israel |
| Кляйнерт | Ukraine |
| friedrich kleinert PL (b. 1633) |
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markus friedrich kleinert German artist, 1694-1742, DE (b. 1694) |
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| adolph friedrich kleinert Baltic German theologian, PL (b. 1802) |
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| karl ferdinand kleinert (b. 1795) |
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| friedrich kleinert (1829-1862) (b. 1829) |
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| paul kleinert German theologian, DE (b. 1837) |
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| heinrich kleinert (b. 1853) |
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| karl erasmus kleinert AT (b. 1857) |
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| josef edgar kleinert AT (b. 1859) |
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| max kleinert (b. 1865) |
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christa susanne dorothea kleinert economist, PL (b. 1925) |
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| hermine e. kleinert American artist (1880-1943), US (b. 1880) |
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detlef kleinert German politician (1932-2016), DE (b. 1932) |
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| hans kleinert Oostenrijks; schilder; 1884; Gablenz; 1972; Klagenfurt, CZ (b. 1884) |
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| jaroslav kleinert (b. 1882) |
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