Cognomen Deckert (Deckert 
, デッケルト, Деккерт 
) , around the globe, is quite a common family name. The cognomen Deckert is characteristic of Western Europe, particularly Germany, where it is quite a rare surname, Switzerland, and France, where it is a rare surname. Measured by absolute frequency, the name is most common in Germany, the United States, and France. Very seldom, Deckert is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Deckert | Brazil, Germany, France, Poland, United States |
| Деккерт | Ukraine, Russia, Kazakhstan |
| ignác václav deckert CZ (b. 1766) |
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| michael deckert (b. 1773) |
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| benjamin deckert (b. 1794) |
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| joseph deckert Austrian priest (1843-1901), AT (b. 1843) |
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| emil deckert German university teacher, DE (b. 1848) |
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| friedrich eduard deckert AT (b. 1873) |
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| adalbert deckert Dr. sc. nat. Eberhard-Karls-Universität Tübingen 1909 (b. 1884) |
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günter deckert far-right German political activist, DE (b. 1940) |
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| hermann deckert German art historian, DE (b. 1899) |
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günter deckert German Nordic combined skier, DE (b. 1950) |
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| nikolai deckert (b. 1896) |
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| walter deckert (b. 1896) |
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| kurt deckert German zoologist and ichtyologist (1907-1987), DE (b. 1907) |
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manfred deckert East German ski jumper and local politician, DE (b. 1961) |
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| adalbert deckert (1913-2008), DE (b. 1913) |
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