Last name Эрхарт (Erhart 
, Ehrhart , Earhart 
) , in the world, is a common family name. The family name Эрхарт is characteristic of Austria, where it is quite a common surname, Slovenia, where it is quite a rare surname, and France. In absolute terms, the name is most common in the United States, Germany, and France. Very seldom, Эрхарт is the forename as well as the last name.