Last name Thongniyom (Thongniyom 
) , in the world, is a very rare cognomen. The last name Thongniyom is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Thongniyom is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thongniyom | Thailand |