Surname Masný (Masný 
, ماسني, Масный 
) , across the world, is a rare family name. The family name Masný is habitual in Eastern Europe, particularly Slovakia, where it is a rare surname, Czechia, and Belarus. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Russia, Czechia, and Slovakia.
| VARIANT | COUNTRY |
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| Masný | Slovakia, Czechia |
| Масный | Belarus, Ukraine, Russia, Kazakhstan |
| rudolf masný Czechoslovak writer (1907-1985), SK (b. 1907) |
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| ferdinand masný (b. 1902) |
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michal masný Slovak volleyball player, SK (b. 1979) |
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| miroslav masný (b. 1919) |
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| vojtech masný Czechoslovak soccer player, SK (b. 1938) |
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| marián masný Slovak footballer, SK (b. 1950) |
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| oldřich masný (b. 1952) |
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| radim masný (b. 1955) |
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| jiří masný CZ (b. 1960) |
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| oldřich masný (b. 1986) |
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