Last name Siwak (Siwak 
, Сивак 
) , all around the world, is a common surname. The surname Siwak is characteristic of Eastern Europe, particularly Belarus, where it is quite a common surname, Ukraine, where it is quite a rare surname, and Poland. In absolute terms, it is commonest in Eastern Europe, particularly Ukraine, Russia, and Poland. Very seldom, Siwak is the forename as well as the last name.
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juliusz siwak Lieutenant colonel of the Polish Army, PL (b. 1883) |
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albin siwak Polish politician, PL (b. 1933) |
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| w. j. siwak (b. 1922) |
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tomasz jan siwak PL (b. 1973) |
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| doris r siwak researcher |
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| ewa siwak researcher (ORCID 0000-0002-6993-9564) |
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| piotr siwak researcher ORCID ID = 0000-0002-5785-0810 |
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| karol siwak Polish handball player, PL (b. 1997) |
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