Surname Patoomsang (Patoomsang 
) , in the entire world, is an extremely rare cognomen. The cognomen Patoomsang is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Patoomsang | Thailand |
Somsak, Pornphan, Pimphakan, and Pongphiphat