Last name อินจันทร์ (Inchan 
, อินจันทร์ ) , in the world, is quite a common cognomen. The last name อินจันทร์ is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname, Indonesia, where it is a very rare surname, and Philippines. Not in comparison with a country's population, it most frequently occurs in Thailand, Indonesia, and China. Likewise, อินจันทร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Inchan | Thailand, India, South Korea, Indonesia, China |
| อินจันทร์ | Thailand |