Cognomen สะมะถะธัญกรณ์ (สะมะถะธัญกรณ์ 
) , worldwide, is a very rare family name. The last name สะมะถะธัญกรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| สะมะถะธัญกรณ์ | Thailand |