Family name เพิ่มสวัสดิ์ (เพิ่มสวัสดิ์, Permsawat 
) , globally, is a very rare surname. The last name เพิ่มสวัสดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Permsawat | Thailand |
Permsawad, Phoemsawad, Puemsawas, and Soemsawat