Surname รัตนชาย (รัตนชาย 
) , in all the world, is a very rare cognomen. The family name รัตนชาย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, รัตนชาย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รัตนชาย | Thailand |