Family name รัตน์ประเสริฐสุข (รัตน์ประเสริฐสุข 
) , throughout the world, is a very rare surname. The last name รัตน์ประเสริฐสุข is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตน์ประเสริฐสุข | Thailand |