Cognomen ທຳ (Dhamma 
, ທຳ, धर्म) , around the globe, is quite a rare last name. The last name ທຳ is habitual in Myanmar, where it is quite a rare surname, Sri Lanka, where it is a rare surname, and United Arab Emirates. Measured by absolute frequency, it is commonest in Myanmar, Indonesia, and India. Also, ທຳ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dhamma | Myanmar, United Arab Emirates, India, Indonesia, Sri Lanka |