Cognomen Buasay (Buasay 
) , throughout the world, is a very rare surname. The cognomen Buasay is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Much less frequently, Buasay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Buasay | Thailand, Philippines |