Surname Guiok (Guiok 
) , all around the world, is a very rare last name. The cognomen Guiok is characteristic of South-eastern Asia, particularly Philippines, where it is a very rare surname. More prevalently, Guiok is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guiok | South Korea, United States, Philippines |