Cognomen Šejnoha (Šejnoha 
, Sejnoha 
) , around the globe, is a rare family name. The cognomen Šejnoha is habitual in Eastern Europe, particularly Czechia, where it is quite a rare surname, Slovakia, where it is a rare surname, and Hungary, where it is a very rare surname. In absolute terms, it is commonest in Czechia, the United States, and Slovakia.
| VARIANT | COUNTRY |
|---|---|
| Šejnoha | Czechia |
| Sejnoha | Germany, Czechia, Hungary, United States, Slovakia |
| václav vojtěch šejnoha (b. 1859) |
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| josef šejnoha CZ (b. 1879) |
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| jaroslav šejnoha CZ (b. 1889) |
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| josef šejnoha CZ (b. 1901) |
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| jan šejnoha CZ (b. 1907) |
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| jiří šejnoha Czech civil engineer and university professor, CZ (b. 1939) |
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| michal šejnoha Ph.D. Rensselaer Polytechnic Institute 1996 (b. 1966) |
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