Surname Ermach (Ермаш 
, Ermach 
) , all over the world, is a rare last name. The family name Ermach is habitual in Kazakhstan, where it is a rare surname, Kyrgyzstan, and Ukraine, where it is a very rare surname. In absolute terms, it is commonest in Russia, Kazakhstan, and Ukraine. Likewise, Ermach is the forename as well as the last name.