Cognomen Gadoun (Гадун 
, Gadoun) , globally, is a rare surname. The last name Gadoun is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Belarus, Ukraine, and Russia. Much less frequently, Gadoun is the forename as well as the last name.