Last name Έρση (Ersi 
, Έρση) , across the world, is a rare cognomen. The last name Έρση is habitual in Albania, where it is quite a rare surname, Greece, and Honduras, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Indonesia, Greece, and Albania. More prevalently, Έρση is the forename as well as the last name.