Last name Sladky (Sladky 
) , across the world, is quite a rare family name. The surname Sladky is characteristic of Czechia, where it is quite a rare surname, Slovakia, and Austria, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Czechia, the United States, and Germany.
| VARIANT | COUNTRY |
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| Sladky | Austria, Germany, Slovakia, Czechia, United States |
| jerzy sladky PL (b. 1886) |
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| honorata sladky PL (b. 1889) |
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| günter sladky German boxer, DE (b. 1929) |
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| jim sladky American figure skater, US (b. 1947) |
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| matt sladky college basketball player (1996–1998) Navy |
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| ronald sladky researcher |
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| valentina c sladky researcher |
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| kurt k. sladky researcher |
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| franz sladky |
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