Worldwide, Кайсан (Kaisan 
, Kaysan 
, Keysan 
) is quite a common male forename. The first name Кайсан is characteristic of Japan, where it is quite a rare masculine name, Indonesia, where it is a rare masculine name, and Bangladesh, where it is a very rare masculine name. Not in comparison with a country's population, it is commonest in Japan, Indonesia, and India. Very seldom, Кайсан is the last name as well as the forename.