Family name Kastner (Kastner 
, Кастнер 
, קסטנר 
) , all over the world, is a common last name. The cognomen Kastner is characteristic of Austria, where it is quite a common surname, Germany, and Czechia, where it is quite a rare surname. In absolute terms, it is the most numerous in Germany, the United States, and Austria. Very seldom, Kastner is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kastner | United States, Czechia, France, Austria, Germany |
| Кестнер, Кастнер | Ukraine, Russia, Kazakhstan |
| קסטנר | Israel |
Kastnerová, and Kästner
| simon kastner (b. 1350) |
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| sebastian kastner DE (b. 1500) |
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| elias kastner (b. 1564) |
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| jacob kastner (b. 1620) |
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| nepomucenus kastner CZ (b. 1725) |
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jean-georges kastner French composer and author, FR (b. 1810) |
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| johann evangelist kastner Austrian painter, 1776-1827, AT (b. 1772) |
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wilhelm kastner German politician and jurist (1824-1898), DE (b. 1824) |
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| karl wilhelm gottlob kastner chemist, DE (b. 1783) |
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| johann baptist kastner (b. 1775) |
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frédéric kastner French physicist, FR (b. 1852) |
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| carl friedrich august theodor kastner (b. 1797) |
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jan kastner Czech artist (1860-1912), CZ (b. 1860) |
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| leopold kastner (b. 1810) |
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| kastner, josef d. ä. (b. 1810) |
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