Last name Ерма (Erma 
, Yerma 
, Ерма 
) , globally, is quite a common family name. The last name Ерма is habitual in Indonesia, where it is quite a rare surname, Finland, and Bulgaria, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Indonesia, India, and Mexico. More prevalently, Ерма is the forename as well as the last name.