Family name Ергун (Ergun 
, Ергун 
, Ergoun 
) , in the entire world, is quite a common last name. The surname Ергун is characteristic of Western Asia, particularly Turkey, where it is quite a rare surname, Cyprus, and Azerbaijan. In absolute terms, the name is most common in Turkey, France, and Germany. Also, Ергун is the forename as well as the last name.