Last name ศิริฉาย (Sirichai 
, ศิริฉาย , Sirichay ) , all over the world, is quite a rare family name. The cognomen ศิริฉาย is characteristic of Thailand, where it is quite a rare surname, Australia, where it is a very rare surname, and Malaysia. Not in comparison with a country's population, it is commonest in Thailand, China, and the United States. More frequently, ศิริฉาย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sirichai | Cameroon, China, United States, Myanmar, Thailand |
| ศิริฉาย | Thailand |
| Sirichay | United States, Thailand |