Throughout the world, Kasy (Kasy 
, Казы 
, Касий 
) is a rare unisex given name. The given name Kasy is characteristic of Azerbaijan, where it is quite a rare boy's name, Kyrgyzstan, where it is quite a rare primarily male, but scarcely female name, and the United States, where it is a very rare unisex name. Likewise, Kasy is the last name as well as the forename.