Last name Sinaya (Sinaya 
) , throughout the world, is quite a rare surname. The cognomen Sinaya is characteristic of Reunion, where it is quite a common surname, Singapore, where it is a rare surname, and Sri Lanka. Measured by absolute frequency, it is the most numerous in India, Indonesia, and Philippines. Much less frequently, Sinaya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sinaya | Philippines, Reunion, India, Sri Lanka, Indonesia |