Last name สมุทรสิริยาธร (สมุทรสิริยาธร 
) , across the world, is an extremely rare cognomen. The family name สมุทรสิริยาธร is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สมุทรสิริยาธร | Thailand |