Family name Šejna (Sejna 
, Šejna 
) , all around the world, is a rare last name. The cognomen Šejna is habitual in Slovakia, where it is quite a rare surname, Czechia, and Austria, where it is a rare surname. In absolute terms, this name is the most popular in Czechia, Slovakia, and the United States. Very seldom, Šejna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sejna | Austria, Czechia, United States, Slovakia, India |
| Šejna | Czechia, Croatia |
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karel šejna Czech conductor and contrabassist (1896-1982), CZ (b. 1896) |
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| josef šejna CZ (b. 1876) |
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| felix šejna CZ (b. 1909) |
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| jan šejna Czech politician (1927-1997), US (b. 1927) |
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| libor šejna (b. 1940) |
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| karel šejna CZ (b. 1944) |
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| ivan šejna (b. 1945) |
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| libor šejna CZ (b. 1964) |
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