Cognomen Sinaysky (Sinaysky 
, Синаыский 
, Синайский 
) , in the entire world, is a rare family name. The surname Sinaysky is habitual in Russia, where it is a rare surname, Belarus, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Russia, Belarus, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Sinaysky | United Kingdom, United States |
| Синаыский | Russia |
| Синайский | Russia, Belarus |
Синайський, and Синаыскы