Family name คัค (Khak 
, คัค) , in the entire world, is quite a rare surname. The surname คัค is habitual in Saudi Arabia, where it is a rare surname, Oman, and Malaysia. Not in comparison with a country's population, it is the most numerous in Pakistan, Saudi Arabia, and India. Also, คัค is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khak | Pakistan, India, Indonesia, Malaysia, Saudi Arabia |