Family name สินธุ์สมุทร (สินธุ์สมุทร 
) , across the world, is a very rare last name. The cognomen สินธุ์สมุทร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สินธุ์สมุทร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สินธุ์สมุทร | Thailand |