Surname Triyawathanyoo (Triyawathanyoo 
) , in the world, is a very rare last name. The family name Triyawathanyoo is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Triyawathanyoo | Thailand |
Sirikorn, Kitthisorn, Phekhong, Nophadol, and Kittikhom