Last name ยังสวัสดิ์ (ยังสวัสดิ์ 
, So Good 
) , around the world, is a rare cognomen. The surname ยังสวัสดิ์ is characteristic of Thailand, where it is a rare surname, and France, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ยังสวัสดิ์ | Thailand |
| So Good | Thailand, France |
Yoengsawat, and Yungsawad