Cognomen エルナ (Erna 
, Elna , エルナ 
) , globally, is a common last name. The surname エルナ is habitual in Poland, where it is quite a common surname, Bosnia and Herzegovina, where it is quite a rare surname, and Indonesia. Measured by absolute frequency, this name is the most popular in Indonesia, Poland, and Philippines. More frequently, エルナ is the forename as well as the last name.