Family name พงศ์เกษม (Pongkasem 
, พงศ์เกษม ) , around the globe, is a rare last name. The surname พงศ์เกษม is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Likewise, พงศ์เกษม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pongkasem | United States, Thailand |
| พงศ์เกษม | Thailand |