Surname ทศธรรม (ทศธรรม 
, Tossatham 
, Thotham 
) , in the world, is a rare last name. The family name ทศธรรม is habitual in Thailand, where it is a rare surname, and India, where it is an extremely rare surname. Also, ทศธรรม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ทศธรรม, Thobtham | Thailand |
| Tossatham | China, Thailand |
| Thotham | India, United States, Thailand |
Thassatham, Thatshatham, Thodsatham, Thosatham, Todsatham, and Totsatham