Family name Ергарт (Ергарт 
, Ergart 
) , in all the world, is a rare surname. The family name Ергарт is habitual in Germany, where it is a very rare surname, Ukraine, and Kazakhstan. Measured by absolute frequency, this name is the most popular in Germany, Russia, and Ukraine. Much less frequently, Ергарт is the forename as well as the last name.