Surname Kaltayev (Калтаев 
, Kaltayev 
) , all over the world, is quite a rare family name. The family name Kaltayev is habitual in Azerbaijan, where it is quite a rare surname, Kazakhstan, and Kyrgyzstan, where it is a rare surname. Not in comparison with a country's population, it is commonest in Kazakhstan, Azerbaijan, and Uzbekistan. Much less frequently, Kaltayev is the forename as well as the last name.