Family name ธรรมกาย (ธรรมกาย 
, Thammaguy , Thamgrasae ) , in the entire world, is a very rare last name. The last name ธรรมกาย is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ธรรมกาย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thammaguy, ธรรมกาย, Thamgrasae, Thammakamo | Thailand |
Dhammakamo, Tammavised, Thamakam, Thamatkang, Thamgamk, Thamkaddug, Thamkat, Thammacgad, Thammagay, Thammakai, Thammakait, Thammakamon, Thammakard, and Thummakai