Last name สมเสียว (สมเสียว 
) , all around the world, is a very rare surname. The family name สมเสียว is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สมเสียว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมเสียว | Thailand |