Last name ธัมม์ (Tham 
, ธัมม์ 
) , all around the world, is a common cognomen. The family name ธัมม์ is habitual in Singapore, where it is a common surname, Malaysia, where it is quite a common surname, and Macao (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in South-eastern Asia, particularly Malaysia, Singapore, and Vietnam. Likewise, ธัมม์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tham | Vietnam, Malaysia, Singapore, Indonesia, Taiwan |
| ธัมม์ | Thailand |