Cognomen Iwaniuk (Iwaniuk 
) , all around the world, is quite a rare surname. The cognomen Iwaniuk is habitual in Poland, where it is quite a rare surname, Switzerland, where it is a rare surname, and Canada. In absolute terms, it is commonest in Poland, the United States, and Germany. More frequently, Iwaniuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iwaniuk | Germany, Canada, Poland, United States, Switzerland |
|
wacław iwaniuk Poet and literary critic (1912-2001), PL (b. 1912) |
|
| mikołaj iwaniuk Polish Righteous Among the Nations, PL (b. 1887) |
|
|
|
krzysztof iwaniuk PL (b. 1959) |
|
| danuta iwaniuk Polish Righteous Among the Nations, PL (b. 1932) |
|
|
| jan iwaniuk (b. 1943) |
|
|
| andrew n. iwaniuk biologist, CA (b. 1974) |
|
|
| andrew n iwaniuk researcher |
|
|
| piotr iwaniuk researcher |
|
|
| andrzej iwaniuk Polish Righteous Among the Nations, PL |
|
|
| agnieszka iwaniuk researcher (ORCID 0000-0001-6499-4989), PL |
|
|
| rafał iwaniuk actor, PL (b. 1982) |
|