Last name Vilchak (Vilchak 
, Вильчак 
) , around the world, is a rare family name. The last name Vilchak is characteristic of Belize, where it is quite a rare surname, Belarus, where it is a rare surname, and Ukraine, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Belize, Russia, and Belarus.