Cognomen Tvrdoň (Tvrdoň 
) , in the entire world, is a rare surname. The cognomen Tvrdoň is characteristic of Slovakia, where it is quite a rare surname, Czechia, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Tvrdoň | Czechia, Slovakia, United States |
| alois tvrdoň (b. 1908) |
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| jozef tvrdoň CZ (b. 1911) |
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| františek tvrdoň (b. 1913) |
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| martin tvrdoň (b. 1914) |
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| jiří tvrdoň Czech aircraft pilot (?-1954), CZ (b. 1929) |
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roman tvrdoň Slovak ice hockey player, SK (b. 1981) |
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| milan tvrdoň CZ (b. 1927) |
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| otakar tvrdoň CZ (b. 1931) |
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marek tvrdoň Slovak ice hockey player, SK (b. 1993) |
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| jiří tvrdoň CZ (b. 1942) |
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| milan tvrdoň (b. 1945) |
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| jaroslav tvrdoň CZ (b. 1950) |
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| leo tvrdoň CZ (b. 1960) |
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| erik tvrdoň (b. 1962) |
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| michal tvrdoň (b. 1978) |
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