Worldwide, Калин (Calin 
, Kalin , Kalyn 
) is a common epicene forename. The given name Калин is habitual in Aland Islands, where it is quite a common boy's name, Romania, where it is quite a common primarily masculine, but very seldom feminine name, and Bulgaria, where it is quite a common boy's name. In absolute terms, the name is most common in Romania, the United States, and India. Also, Калин is the last name as well as the forename.