Surname Sidiy (Sidiy 
, Сидий 
) , around the globe, is a very rare last name. The surname Sidiy is characteristic of Georgia, where it is a very rare surname, Russia, and Kazakhstan. Measured by absolute frequency, it is commonest in India, Russia, and Kazakhstan. Also, Sidiy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sidiy | Ukraine, Georgia, India |
| Сидий | Russia, Kazakhstan |