Cognomen Ikayev (Икаев 
, Ikayev ) , across the world, is a rare last name. The cognomen Ikayev is characteristic of Russia, where it is a rare surname, Kazakhstan, and Belarus, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Russia, Kazakhstan, and Ukraine. Very seldom, Ikayev is the forename as well as the last name.