Across the world, Касин (Kasin 
, Kasine 
, Касин 
) is quite a rare mostly masculine, but uncommonly female first name. The first name Касин is habitual in Hong Kong, where it is a rare feminine name, Ghana, where it is a rare masculine name, and Georgia, where it is a rare largely masculine, but infrequently feminine name. Measured by absolute frequency, it is the most numerous in India, Indonesia, and Nigeria. Also, Касин is the last name as well as the forename.