Family name จอมจักร (จอมจักร 
, Jomchak , Chomchak 
) , in the world, is a very rare last name. The cognomen จอมจักร is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Also, จอมจักร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| จอมจักร, Jomchak | Thailand |
| Chomchak | United States, Thailand |