Last name ธนวัฒนาวนิช (ธนวัฒนาวนิช 
) , throughout the world, is an extremely rare surname. The cognomen ธนวัฒนาวนิช is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธนวัฒนาวนิช | Thailand |