Family name ประจงสุข (ประจงสุข 
) , all over the world, is a very rare surname. The surname ประจงสุข is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ประจงสุข is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ประจงสุข | Thailand |