Family name กุสยม (Kousum 
, กุสยม 
) , in all the world, is a very rare surname. The cognomen กุสยม is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Likewise, กุสยม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kousum | United States, India |
| กุสยม | Thailand |