Family name Ongkarn (Ongkarn 
) , around the globe, is a very rare cognomen. The cognomen Ongkarn is characteristic of Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Likewise, Ongkarn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ongkarn | China, United States, Thailand |