Family name Tun Oo (Tun Oo 
) , worldwide, is quite a rare cognomen. The last name Tun Oo is characteristic of South-eastern Asia, particularly Myanmar, where it is quite a rare surname, Singapore, where it is a rare surname, and Malaysia, where it is a very rare surname. In absolute terms, it is commonest in South-eastern Asia, particularly Myanmar, Indonesia, and Malaysia. Much less frequently, Tun Oo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tun Oo | Myanmar, Malaysia, Thailand, Singapore, Indonesia |