Family name Oopatham (Oopatham 
) , in the world, is an extremely rare last name. The cognomen Oopatham is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, Oopatham is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oopatham | Thailand, United States |