In all the world, Kayun (Kayun 
, Каюн 
) is a rare dominantly masculine, but uncommonly girly first name. The first name Kayun is characteristic of Indonesia, where it is a rare dominantly boy's, but seldom girly name, and India, where it is an extremely rare principally boy's, but scarcely girly name. More prevalently, Kayun is the last name as well as the forename.