Surname Twardzik (Twardzik 
) , globally, is quite a rare last name. The last name Twardzik is habitual in Poland, where it is quite a rare surname, Czechia, and Germany, where it is a rare surname. Measured by absolute frequency, it is commonest in Poland, the United States, and Germany. Likewise, Twardzik is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Twardzik | United States, Czechia, Poland, Germany, Canada |
| andrzej twardzik Polish Righteous Among the Nations, PL (b. 1887) |
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dave twardzik American basketball player, US (b. 1950) |
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| maria twardzik Polish Righteous Among the Nations, PL (b. 1901) |
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| czesław twardzik PL (b. 1914) |
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| peter twardzik Polish Righteous Among the Nations, PL (b. 1927) |
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| dick twardzik pianist, US (b. 1931) |
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| julia twardzik Polish Righteous Among the Nations, PL (b. 1932) |
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| theodore f. twardzik PL (b. 1927) |
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filip twardzik Czech soccer player, CZ (b. 1993) |
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patrik twardzik Czech association football player, CZ (b. 1993) |
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| wacław twardzik PL (b. 1937) |
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| rené twardzik Czech soccer player, CZ (b. 1970) |
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| erica twardzik researcher (ORCID 0000-0002-3514-2610) |
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| ludwik twardzik Polish Righteous Among the Nations, PL |
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| maciej twardzik researcher |
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