Last name สิริสวัสดิ์ (Sirisawat 
, สิริสวัสดิ์ ) , in the world, is quite a rare surname. The family name สิริสวัสดิ์ is habitual in Thailand, where it is quite a rare surname, New Zealand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Thailand, the United States, and New Zealand. Very seldom, สิริสวัสดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sirisawat | New Zealand, Thailand, United States, Malaysia |
| สิริสวัสดิ์ | Thailand |