Cognomen Эйдус (Eidus 
, Эйдус , Ejdus) , in the entire world, is a very rare surname. The last name Эйдус is habitual in Russia, where it is a very rare surname, Australia, and Canada. Measured by absolute frequency, it is the most numerous in Russia, the United States, and Germany. Much less frequently, Эйдус is the forename as well as the last name.