Cognomen Erchina (Ершина 
, Erchina 
) , in the world, is a very rare surname. The surname Erchina is habitual in Kazakhstan, where it is a rare surname, Russia, where it is an extremely rare surname, and Brazil. Not in comparison with a country's population, the name is most common in Kazakhstan, Russia, and India. Very seldom, Erchina is the forename as well as the last name.