Last name Rigus (Rigus 
, Ригус 
) , all around the world, is a rare surname. The family name Rigus is characteristic of Ukraine, where it is a rare surname, Belarus, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Eastern Europe, particularly Ukraine, Russia, and Belarus. Very seldom, Rigus is the forename as well as the last name.