Surname Ерган (Ergan 
, Ерган 
, Yergan 
) , worldwide, is quite a rare last name. The cognomen Ерган is characteristic of Turkey, where it is quite a rare surname, Israel, where it is a rare surname, and France, where it is a very rare surname. Measured by absolute frequency, the name is most common in Turkey, the United States, and Indonesia. Very seldom, Ерган is the forename as well as the last name.