Cognomen Kierzek (Kierzek 
) , in the world, is quite a rare last name. The cognomen Kierzek is characteristic of Poland, where it is quite a rare surname, France, where it is a rare surname, and Germany, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Poland, the United States, and France. Likewise, Kierzek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kierzek | Germany, United Kingdom, United States, Poland, France |
| heinrich kierzek German newspaper publisher, DE (b. 1909) |
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gérald kierzek French emergency physician, FR (b. 1974) |
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| andrzej kierzek Polish biophysicist, PL (b. 1937) |
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| matthias kierzek German newspaper and book publisher, DE (b. 1950) |
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| mira kierzek chess player (b. 1955) |
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| elżbieta kierzek Polish chemist and biologist, PL |
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| roman kierzek researcher |
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| ryszard kierzek Polish researcher, PL |
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| paulina kierzek (b. 1979) |
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