Surname Bilchuk (Бильчук 
, Bilchuk 
, Билчук ) , in all the world, is a rare last name. The surname Bilchuk is habitual in Russia, where it is a rare surname, Belarus, where it is a very rare surname, and Kazakhstan. In absolute terms, the name is most common in Eastern Europe, particularly Russia, Ukraine, and Belarus. Very seldom, Bilchuk is the forename as well as the last name.