Cognomen Iwanczuk (Iwanczuk 
) , around the world, is quite a rare last name. The last name Iwanczuk is characteristic of Poland, where it is quite a rare surname, Argentina, where it is a rare surname, and Estonia. In absolute terms, it is commonest in Poland, Brazil, and Argentina. Likewise, Iwanczuk is the forename as well as the last name.
| patrick iwanczuk French politician, FR (b. 1952) |
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| marek iwanczuk (b. 1962) |
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