Family name ไนย (Nai 
, ไนย 
) , all over the world, is a widespread cognomen. The family name ไนย is habitual in Fiji, where it is quite a common surname, Myanmar, and Malaysia (explore the name in all countries). In absolute terms, it is commonest in India, Myanmar, and China. Very seldom, ไนย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nai | Indonesia, Myanmar, China, India, Malaysia |
| ไนย | Thailand |