Surname จักจั่น (Jakjan 
, จักจั่น, Jakq ) , across the world, is a rare last name. The cognomen จักจั่น is habitual in Estonia, where it is quite a rare surname, Czechia, and Slovakia, where it is a rare surname. Measured by absolute frequency, it is commonest in Czechia, the United States, and Slovakia. Very seldom, จักจั่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jakjan | Estonia, India, Thailand |
| Jakq | Thailand |
| Cichra | Czechia, Slovakia, China, Canada, United States |
Chakchan, Chakkachan, Ciccardi, Cjak, Jakchaiung, Jakchalat, Jakchan, Jakchookiat, Jakjaan, and Jakkea