Family name Эрдеи (Erdei 
, Erdey 
, Эрдеи) , all around the world, is a common last name. The surname Эрдеи is characteristic of Hungary, where it is quite a common surname, Romania, and Serbia, where it is quite a rare surname. In absolute terms, this name is the most popular in Hungary, Romania, and the United States. Very seldom, Эрдеи is the forename as well as the last name.