Surname คงประโยชน์สุข (คงประโยชน์สุข 
) , worldwide, is an extremely rare cognomen. The family name คงประโยชน์สุข is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| คงประโยชน์สุข | Thailand |