Family name Wiecek (Wiecek 
) , across the world, is quite a rare last name. The family name Wiecek is characteristic of Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and Czechia. Not in comparison with a country's population, the name is most common in Poland, the United States, and Germany. More frequently, Wiecek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wiecek | Germany, France, Poland, United Kingdom, United States |
| karel wiecek association football player (b. 1928) |
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| miroslav wiecek Czech soccer player (1931-1997), CZ (b. 1931) |
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| william m. wiecek (b. 1938) |
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| michael wiecek (b. 1962) |
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| radovan wiecek CZ (b. 1969) |
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| michaela wiecek goldsmith and jewelry designer, DE |
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| joanna wiecek researcher |
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| elyssa wiecek researcher |
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| magdalena wiecek researcher |
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| margaret wiecek polish-American mathematician |
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| mary wiecek |
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