Last name Thachan (Thachan 
) , in the entire world, is a rare surname. The last name Thachan is habitual in Thailand, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, Thachan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thachan | India, United States, Thailand |