Family name เพิ่มวัฒนา (เพิ่มวัฒนา, Phoemwatthana 
) , in all the world, is an extremely rare last name. The surname เพิ่มวัฒนา is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phoemwatthana | Thailand |