Cognomen Pienitz (Pienitz 
) , around the world, is a very rare last name. The family name Pienitz is characteristic of Germany, where it is a rare surname, Canada, where it is an extremely rare surname, and Brazil.
| VARIANT | COUNTRY |
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| Pienitz | Brazil, United States, Germany, Canada |
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ernst gottlob pienitz German psychiatrist and physician, DE (b. 1777) |
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| christian gotthelf pienitz (b. 1774) |
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| ernst moritz hermann pienitz German officer, DE (b. 1847) |
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| heinrich theodor friedrich pienitz DE (b. 1846) |
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| reinhard pienitz geographer and university professor, CA (b. 1961) |
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| reinhard pienitz (b. 1961) |
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| hans pienitz American ice hockey player, US (b. 1988) |
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