Cognomen Tua-Ok (Tua-Ok 
) , in the entire world, is a very rare surname. The last name Tua-Ok is characteristic of South-eastern Asia, particularly Philippines, where it is a very rare surname. Parts of the name also exists independently as a last name Tua, and a last name Ok.
| VARIANT | COUNTRY |
|---|---|
| Tua-Ok | Philippines |