Surname Tienthai (Tienthai 
) , all around the world, is a very rare cognomen. The last name Tienthai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Tienthai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tienthai | Thailand |
| paisan tienthai researcher (ORCID 0000-0001-9554-7436) |
|