Last name Natag-Oy (Natag-Oy 
) , around the globe, is a very rare cognomen. The surname Natag-Oy is characteristic of Philippines, where it is a very rare surname, and the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Natag.
| VARIANT | COUNTRY |
|---|---|
| Natag-Oy | Philippines, United States |