Surname ธรรมวิศาล (ธรรมวิศาล 
, Thamwisal , Thamwisan ) , all over the world, is a very rare cognomen. The last name ธรรมวิศาล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thumwisan, ธรรมวิศาล, Thamwisal, Thamwisan | Thailand |