Cognomen Thongngarm (Thongngarm 
) , throughout the world, is a very rare surname. The surname Thongngarm is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thongngarm | Thailand |
| torpong thongngarm researcher (ORCID 0000-0002-3182-4614) |
|