Last name คำจั่น (Pledge 
, คำจั่น) , across the world, is a rare cognomen. The last name คำจั่น is characteristic of Isle of Man, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Australia. Much less frequently, คำจั่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pledge | Australia, Canada, United Kingdom, United States, China |