Surname รัตทยา (รัตทยา 
) , in all the world, is an extremely rare last name. The surname รัตทยา is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, รัตทยา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รัตทยา | Thailand |