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