Across the world, Кайсен (Kaisen 
, Кайсен 
) is a rare primarily male, but very infrequently female first name. The forename Кайсен is habitual in Azerbaijan, where it is quite a rare male name, Kazakhstan, where it is a rare masculine name, and India, where it is an extremely rare epicene name. Also, Кайсен is the last name as well as the forename.