Surname Opasnirattisai (Opasnirattisai 
) , in the world, is a very rare family name. The cognomen Opasnirattisai is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Opasnirattisai | Thailand |
Winus, Chayawit, Chayakorn, and Chananthawat