Family name แสงสมุทร (แสงสมุทร 
, Sengsamut , Sangsamuthr ) , all around the world, is a very rare last name. The last name แสงสมุทร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sangsamuthr, Sengsamut, Saengsamut, แสงสมุทร | Thailand |