Family name Sieam (Sieam 
) , worldwide, is a rare last name. The family name Sieam is habitual in Bangladesh, where it is a rare surname, Egypt, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Much less frequently, Sieam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sieam | Thailand, Egypt, Malaysia, United States, Bangladesh |