In the entire world, Suin (Suin 
, 수인 , Суин 
) is quite a rare epicene first name. The given name Suin is habitual in South Korea, where it is quite a rare largely girly, but infrequently masculine name, Kazakhstan, where it is a rare dominantly male, but uncommonly female name, and Indonesia, where it is a rare unisex name. In absolute terms, it is the most numerous in South Korea, Indonesia, and India. Also, Suin is the last name as well as the forename.