Cognomen Seidlitz (Seidlitz 
, Зейдлиц 
) , worldwide, is quite a rare surname. The last name Seidlitz is habitual in Germany, where it is quite a rare surname, Sweden, where it is a rare surname, and Kazakhstan. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Canada. Very seldom, Seidlitz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Seidlitz | Germany, Sweden, United States, Canada, France |
| Зейдлиц | Kazakhstan, Russia |
| heinrich adolph von seidlitz (b. 1642) |
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| sabina eleonora von seidlitz (b. 1646) |
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| ernst julius von seidlitz (b. 1695) |
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| johann andreas seidlitz DE (b. 1702) |
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| luise justine von seidlitz 1715 - 1737 (b. 1715) |
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| ernst johann von seidlitz (b. 1744) |
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| carl johann seidlitz (b. 1750) |
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| charlotte beate von seidlitz, heiress of wiese 1768 - 14 Feb 1836 Wiese (b. 1768) |
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| johann andreas von seidlitz (b. 1773) |
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| karl friedrich von seidlitz (b. 1791) |
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| alexander von seidlitz (b. 1807) |
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| marie von seidlitz (b. 1808) |
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| friedrich ludolf von seidlitz (b. 1813) |
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| justine charlotte von seidlitz (b. 1816) |
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| georg von seidlitz German entomologist (1840–1917), RU (b. 1840) |
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