Last name Demianchuk (Демянчук 
, Демьянчук 
, Demianchuk 
) , all over the world, is quite a rare family name. The last name Demianchuk is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Демянчук | Ukraine, Russia, Belarus, Kazakhstan |
| Демьянчук | Ukraine, Kazakhstan, Georgia, Russia, Belarus |
| Demianchuk | Argentina, Czechia, Spain, Portugal, Poland |
| Демианчук | Russia |
| oleh i. demianchuk researcher |
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| matriona demianchuk Ukrainian Righteous Among the Nations, UA |
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| alexey demianchuk Ukrainian Righteous Among the Nations, UA |
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Mr, Sergii, Sergei, Serhii, Bogdan, Dmytro, Iiurii, Oksana, Yaryna, Mykola, Natalia, Svitlana, Angelika, Nataliia, Hennadii, Stanislav, Valentyna, Viacheslav, Volodymyr, Eugenia, Maksym, Yurii, Yakov, Amy, Anna, Nina, Vlad, Ivan, Igor, Oleg, Maria, Maxim, Craig, Roman, Denys, Gerry, Lesia, Elena, Vasyl, Irene, Ilona, Iurii, Oleksandr, and Anastasiia