Family name Marciniuk (Marciniuk 
) , around the world, is a rare cognomen. The cognomen Marciniuk is habitual in Poland, where it is quite a rare surname, Switzerland, where it is a very rare surname, and Canada. Not in comparison with a country's population, it is commonest in Poland, Brazil, and Canada. More prevalently, Marciniuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marciniuk | United Kingdom, Poland, Canada, France, Brazil |
| jolanta marciniuk botanist |
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| paweł marciniuk Polish botanist, PL |
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| jolanta marciniuk researcher |
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| paweł marciniuk researcher |
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| piotr marciniuk researcher |
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