Cognomen Tomczak (Tomczak 
, Томчак 
) , in the world, is a common surname. The cognomen Tomczak is characteristic of Poland, where it is quite a common surname, Germany, where it is quite a rare surname, and Sweden, where it is a rare surname. Measured by absolute frequency, it is commonest in Poland, Germany, and the United States. Also, Tomczak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tomczak | Germany, France, Brazil, United States, Poland |
| Томчак | Kazakhstan, Ukraine, Kyrgyzstan, Belarus, Russia |
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kazimierz tomczak PL (b. 1883) |
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roman tomczak PL (b. 1900) |
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edward tomczak PL (b. 1923) |
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| mieczysław tomczak Polish politician, PL (b. 1886) |
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nicole tomczak-jaegermann Polish Canadian mathematician specializing in geometric functional analysis, CA (b. 1945) |
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| stanisław tomczak Polish Righteous Among the Nations, PL (b. 1898) |
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kim tomczak canadian artist, CA (b. 1952) |
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witold tomczak Polish politician, PL (b. 1957) |
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| władysław tomczak PL (b. 1897) |
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grzegorz tomczak PL (b. 1954) |
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| natalia tomczak PL (b. 1909) |
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marcin tomczak PL (b. 1962) |
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| andrzej tomczak Polish archivist, PL (b. 1922) |
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jacek tomczak Polish politician, PL (b. 1973) |
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| krystian tomczak (b. 1923) |
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