Cognomen Sithaya (Sithaya 
) , in all the world, is a very rare surname. The surname Sithaya is characteristic of Malaysia, where it is a very rare surname, and India, where it is an extremely rare surname. Likewise, Sithaya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sithaya | Myanmar, Malaysia, India, Thailand, South Africa |