Surname Oyag (Oyag 
) , in the world, is a rare family name. The last name Oyag is characteristic of Philippines, where it is a rare surname, Indonesia, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, Oyag is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oyag | Spain, India, Indonesia, Philippines |