Last name อุทยารัตน์ (Utayarat 
, อุทยารัตน์ , Uttayarat 
) , globally, is a rare surname. The family name อุทยารัตน์ is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, อุทยารัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Utayarat, อุทยารัตน์ | Thailand |
| Uttayarat | United States, Thailand |