Around the globe, เรืองอุทัย (เรืองอุทัย 
, Raengauthai, Ruengutai ) is a very rare girly first name. The first name เรืองอุทัย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare feminine name. More frequently, เรืองอุทัย is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ruengutai, เรืองอุทัย | Thailand |
| Ruangutai | United States, Thailand |
Ruang Uthai, and Ruanguthai