Last name Ерні (Erni 
, Ерні 
) , throughout the world, is a common family name. The family name Ерні is characteristic of Switzerland, where it is quite a common surname, Liechtenstein, and Indonesia, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Indonesia, Switzerland, and Philippines. More frequently, Ерні is the forename as well as the last name.