Family name คัก (Khak 
, Ckak 
, คัก ) , in the entire world, is quite a rare cognomen. The cognomen คัก is habitual in Saudi Arabia, where it is a rare surname, Oman, and Malaysia. In absolute terms, this name is the most popular in Pakistan, Saudi Arabia, and India. Also, คัก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khak | Saudi Arabia, Malaysia, Pakistan, India, Indonesia |
| คัก, Ckak | Thailand |