Surname ธัญธาดาวาณิช (ธัญธาดาวาณิช 
) , all over the world, is a very rare last name. The family name ธัญธาดาวาณิช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธัญธาดาวาณิช | Thailand |