Cognomen หงส์สิทธิพงศ์ (หงส์สิทธิพงศ์ 
) , across the world, is a very rare last name. The family name หงส์สิทธิพงศ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| หงส์สิทธิพงศ์ | Thailand |