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All around the world, Oo (Oo
, У
, Оо
) is a widespread unisex first name. The given name Oo is characteristic of Mongolia, where it is a widespread gender-neutral name, Myanmar, where it is quite a rare principally masculine, but scarcely female name, and India, where it is quite a rare female name. More frequently, Oo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Oo | Egypt, Myanmar, Malaysia, India, China |
| У | Kazakhstan, Russia, China, Azerbaijan, Ukraine |
| Оо | Kazakhstan, Russia, Kyrgyzstan, China, Ukraine |
| ウー | Japan |
Oo is also a name for the fictitious and mythical characters: .