All over the world, รัตนัย (Ratanai 
, รัตนัย , Rattanai ) is quite a rare principally feminine, but very infrequently masculine forename. The forename รัตนัย is characteristic of Thailand, where it is a rare epicene name, and India, where it is a very rare feminine name. Much less frequently, รัตนัย is the last name as well as the forename.