Cognomen Supsiri (ศุภศิริ 
, Supsiri 
, สุภสิริ ) , in the entire world, is a rare family name. The cognomen Supsiri is habitual in Thailand, where it is a rare surname, Canada, where it is an extremely rare surname, and the United States. Likewise, Supsiri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุภศิริ, ศุภศิริ, สุภสิริ | Thailand |
| Supsiri | Canada, Thailand, United States |
ทรัพย์ศิริ, ทรัพย์สิริ, ศุพสิริ, ศุภสิริ, and สุพสิริ