Surname วัฒนาเดช (วัฒนาเดช 
, Wattanade , Wattanadate ) , in all the world, is a very rare last name. The cognomen วัฒนาเดช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wattanade, วัฒนาเดช, Wattanadate, Wattanadech | Thailand |