Surname Injao (Injao 
, อินเจา 
) , around the world, is an extremely rare family name. The family name Injao is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Injao is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Injao | India |
| อินเจา | Thailand |