Last name ธรรมธิกุล (ธรรมธิกุล 
, Tamthikul , Thumthikul ) , around the globe, is a very rare surname. The family name ธรรมธิกุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thumthikul, Tamthikul, ธรรมธิกุล, Thamthikool | Thailand |