In the world, พงศ์สิษฐ์ (พงศ์สิษฐ์ 
) is a very rare boy's first name. The first name พงศ์สิษฐ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare boy's name. Much less frequently, พงศ์สิษฐ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| พงศ์สิษฐ์ | Thailand |