Cognomen สีซอ (Siso 
, สีซอ 
) , in the world, is a common family name. The cognomen สีซอ is habitual in Venezuela, where it is quite a rare surname, Israel, and Algeria. Measured by absolute frequency, it is commonest in Algeria, Venezuela, and Philippines. Also, สีซอ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siso | Algeria, Philippines, India, Israel, Venezuela |
| สีซอ | Thailand |