Cognomen ปฐมสาคร (ปฐมสาคร 
, Phathomsakorn , Pathomsakhon ) , around the globe, is a very rare last name. The cognomen ปฐมสาคร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phathomsakorn, Pathomsakhon, Pathomsakorn, ปฐมสาคร | Thailand |