Cognomen คอส (Koss 
, Khos 
, Khot 
) , worldwide, is a widespread last name. The family name คอส is characteristic of India, where it is quite a common surname, United Arab Emirates, where it is quite a rare surname, and Bahrain. Measured by absolute frequency, it most frequently occurs in India, the United States, and Germany. Much less frequently, คอส is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koss | Germany, Canada, Poland, United States, India |
| Khos | Pakistan, United Kingdom, United States, India, Indonesia |
| Khot | Germany, Canada, United Arab Emirates, United States, India |
| คอส | Thailand |