Last name Gachayev (Гачаев 
, Gachayev 
) , in all the world, is a rare surname. The surname Gachayev is characteristic of Azerbaijan, where it is quite a rare surname, Estonia, where it is a rare surname, and Russia, where it is a very rare surname. In absolute terms, it is the most numerous in Azerbaijan, Russia, and Kazakhstan. Much less frequently, Gachayev is the forename as well as the last name.