Cognomen เกียจ (Kiat 
, เกียจ 
) , around the globe, is a common last name. The last name เกียจ is characteristic of South-eastern Asia, particularly Malaysia, where it is a common surname, Singapore, where it is quite a common surname, and Brunei. Measured by absolute frequency, the name is most common in Malaysia, Indonesia, and China. Much less frequently, เกียจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kiat | Malaysia, China, Indonesia, Singapore, Taiwan |
| เกียจ | Thailand |