Cognomen Ongtrakul (Ongtrakul 
) , all around the world, is a very rare last name. The family name Ongtrakul is habitual in Thailand, where it is an extremely rare surname, China, and the United States. Also, Ongtrakul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ongtrakul | China, United States, Thailand |