Family name สุมนเทียร (สุมนเทียร 
) , in all the world, is an extremely rare last name. The last name สุมนเทียร is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, สุมนเทียร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุมนเทียร | Thailand |