Surname Gui-Ong (Gui-Ong 
) , all over the world, is a very rare cognomen. The cognomen Gui-Ong is habitual in South-eastern Asia, particularly Philippines, where it is a very rare surname. Parts of the name also exists independently as a last name Gui, and a last name Ong.
| VARIANT | COUNTRY |
|---|---|
| Gui-Ong | Philippines |