Surname ก๊วก (Quoc 
, Kuak 
, ก๊วก) , worldwide, is a common family name. The family name ก๊วก is characteristic of Vietnam, where it is quite a rare surname, Macao, and Malaysia. In absolute terms, it is the most numerous in Vietnam, Malaysia, and the United States. Likewise, ก๊วก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Quoc | Australia, Vietnam, France, Malaysia, United States |
| Kuak | Indonesia, Australia, China, Malaysia, United States |
| Kuajok | Canada |