Cognomen ไหร (Rai 
, ไหร 
) , in the entire world, is a prevalent last name. The cognomen ไหร 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). In absolute terms, it is commonest in India, Nepal, and Saudi Arabia. Much less frequently, ไหร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rai | Nepal, India, Indonesia, Malaysia, Saudi Arabia |
| ไหร | Thailand |