Family name Ergachev (Эргашев , Ергашев , Ergachev ) , in all the world, is a common surname. The last name Ergachev is habitual in Kyrgyzstan, where it is quite a common surname, Azerbaijan, and Uzbekistan, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Russia, Kyrgyzstan, and Uzbekistan.