Cognomen เอิร์น (Oen 
, Erns 
, เอิร์น 
) , worldwide, is quite a common surname. The surname เอิร์น is characteristic of Norway, where it is quite a rare surname, Indonesia, and Singapore, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Indonesia, the United States, and Norway. Likewise, เอิร์น is the forename as well as the last name.