Family name Кейман (Khayman 
, Кейман 
) , in the entire world, is a very rare surname. The family name Кейман is habitual in Thailand, where it is a very rare surname, Kazakhstan, and Russia, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Thailand, the United States, and Russia. Also, Кейман is the forename as well as the last name.