Last name Oó (Oó 
) , in all the world, is a rare surname. The surname Oó 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, Oó is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oó | China, Thailand, Myanmar, Egypt |