Last name Lužný (Lužný 
) , throughout the world, is a rare cognomen. The cognomen Lužný is habitual in Eastern Europe, particularly Czechia, where it is quite a rare surname.
| VARIANT | COUNTRY |
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| Lužný | Czechia |
| josef lužný Czech roman-catholic priest, CZ (b. 1847) |
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| augustin lužný Czech priest, writer and translator, CZ (b. 1867) |
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| metoděj lužný Czech bookseller and publisher (1889-1942), CZ (b. 1889) |
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| jindřich lužný CZ (b. 1886) |
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| karel lužný CZ (b. 1912) |
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| jan lužný Czech gardener (1926-2013), SK (b. 1926) |
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| vlastimil lužný (b. 1923) |
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| miloš lužný CZ (b. 1926) |
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| leon lužný CZ (b. 1928) |
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| břetislav lužný (b. 1928) |
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| ivo lužný Czech politician and activist, CZ (b. 1957) |
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| jiří lužný Czech footballer, CZ (b. 1960) |
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| dušan lužný Czech religionist, sociologist and university educator, CZ (b. 1964) |
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| jan lužný CZ (b. 1980) |
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