Surname Bua-Ay (Bua-Ay 
) , around the world, is a rare last name. The last name Bua-Ay is habitual in South-eastern Asia, particularly Philippines, where it is a rare surname. Parts of the name also exists independently as a last name Bua, and a last name Ay.
| VARIANT | COUNTRY |
|---|---|
| Bua-Ay | Philippines |