Family name Seidner (Seidner 
) , across the world, is quite a rare cognomen. The last name Seidner is habitual in Slovakia, where it is quite a rare surname, Austria, and Romania, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in the United States, Germany, and Slovakia.
| VARIANT | COUNTRY |
|---|---|
| Seidner | Germany, Romania, Austria, United States, Slovakia |
| andreas seidner RO (b. 1604) |
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| christian seidner 1728 - (b. 1728) |
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| dorothea sophie seidner 1769 - (b. 1769) |
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| wilhelm seidner DE (b. 1838) |
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| fanny seidner holocaust victim, b. 1864-02-18, AT (b. 1864) |
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| karoline seidner holocaust victim, b. 1868-04-08, AT (b. 1868) |
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| louis seidner holocaust victim, b. 1870-06-05, CZ (b. 1870) |
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| seidner mihály Hungarian electrical engineer (1875-1968), HU (b. 1875) |
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| malvine seidner holocaust victim, b. 1875-02-22, AT (b. 1875) |
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| emil seidner prisoner of a Nazi regime, DE (b. 1879) |
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| otto seidner holocaust victim, b. 1884-11-06, CZ (b. 1884) |
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| vojtěch seidner holocaust victim, b. 1885-07-05, CZ (b. 1885) |
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| salomon seidner prisoner of a Nazi regime, DE (b. 1885) |
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| friedrich seidner holocaust victim, b. 1888-12-14, CZ (b. 1888) |
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| julius seidner holocaust victim, b. 1888-05-30, CZ (b. 1888) |
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