Cognomen อินอาจ (อินอาจ 
) , all over the world, is a very rare family name. The family name อินอาจ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, อินอาจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อินอาจ | Thailand |