Last name เจ็ค (Chek 
, เจ็ค 
) , in all the world, is a common cognomen. The surname เจ็ค is habitual in Macao, where it is quite a common surname, Malaysia, and Mauritania, where it is quite a rare surname. In absolute terms, it is commonest in Malaysia, Algeria, and Kenya. Very seldom, เจ็ค is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chek | Taiwan, Kenya, Morocco, Malaysia, Algeria |
| เจ็ค | Thailand |