Surname ธัมมา (Thumma 
, ธัมมา , Thumda ) , in all the world, is a common last name. The family name ธัมมา is habitual in India, where it is a rare surname, Thailand, and Ireland. In absolute terms, it most frequently occurs in India, the United States, and Thailand. Very seldom, ธัมมา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thumma | Australia, Thailand, India, United States, United Kingdom |
| ธัมมา, Thumda | Thailand |