Cognomen กงจก (กงจก 
) , all around the world, is a very rare family name. The cognomen กงจก is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| กงจก | Thailand |
หรรษา, ธัญยาภัทร์, and พงศ์ธาริน