Family name Ongwutithum (Ongwutithum 
) , throughout the world, is a rare last name. The cognomen Ongwutithum is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ongwutithum | Thailand |
Niwet, Noppon, Orawan, and Pornpermsuk