Last name Milnichuk (Мильничук 
, Milnichuk 
) , in the world, is a rare cognomen. The family name Milnichuk is characteristic of Belarus, where it is a rare surname, Ukraine, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Ukraine, Russia, and Belarus. Much less frequently, Milnichuk is the forename as well as the last name.