Surname Hamaiun (Hamaiun 
, Хамаюн 
) , in the world, is a very rare family name. The surname Hamaiun is habitual in Belarus, where it is a rare surname, Georgia, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, it most frequently occurs in Eastern Europe, particularly Belarus, Russia, and Ukraine. Likewise, Hamaiun is the forename as well as the last name.