Family name Siemieniuk (Siemieniuk 
) , around the globe, is a rare last name. The cognomen Siemieniuk is characteristic of Poland, where it is quite a rare surname, Latvia, where it is a rare surname, and Greece. Measured by absolute frequency, it is the most numerous in Poland, the United States, and the United Kingdom. More prevalently, Siemieniuk is the forename as well as the last name.
| aleksy siemieniuk Polish politician, PL (b. 1939) |
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| danuta siemieniuk PL (b. 1951) |
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| joanna siemieniuk PL (b. 1965) |
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| magdalena siemieniuk researcher (ORCID 0000-0003-2113-8802) |
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| agnieszka siemieniuk researcher, PL |
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| barbara siemieniuk judoka (b. 1983) |
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| aleksandra siemieniuk |
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