Surname Ongsuk (Ongsuk 
) , in all the world, is a very rare family name. The last name Ongsuk is characteristic of Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Also, Ongsuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ongsuk | China, India, Thailand |