Family name Óo (Óo 
) , in the world, is a rare surname. The surname Óo is characteristic of Myanmar, where it is quite a rare surname, Egypt, where it is a very rare surname, and China, where it is an extremely rare surname. Also, Óo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Óo | China, Myanmar, Egypt |