Cognomen รัย (Rai 
, รัย 
) , around the globe, is a prevalent surname. The surname รัย is characteristic of Bhutan, where it is a prevalent surname, Nepal, and Qatar, where it is a widespread surname (explore the name in all countries). Measured by absolute frequency, it is commonest in India, Nepal, and Saudi Arabia. Much less frequently, รัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rai | Malaysia, Indonesia, India, Saudi Arabia, Nepal |
| รัย | Thailand |