Surname วิริยา (วิริยา 
, Viriya 
, Wiriya 
) , in the world, is quite a rare last name. The last name วิริยา is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, Myanmar, where it is a rare surname, and Indonesia. More frequently, วิริยา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| วิริยา | Thailand |
| Viriya | Thailand, Myanmar, India, Laos, Indonesia |
| Wiriya | Thailand, Myanmar, India, United States, Indonesia |