Surname Кайсан (Kaisan 
, Kaysan 
, Keysan 
) , worldwide, is quite a rare last name. The cognomen Кайсан is habitual in Malaysia, where it is quite a rare surname, Turkey, where it is a rare surname, and Japan. Measured by absolute frequency, it most frequently occurs in Indonesia, Japan, and Turkey. More prevalently, Кайсан is the forename as well as the last name.