Surname Tienchai (Tienchai 
) , in the entire world, is a rare family name. The last name Tienchai is characteristic of Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United States. More frequently, Tienchai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tienchai | Malaysia, Singapore, United States, Thailand |