Cognomen Сява (Syava 
, Siava 
, Sjava 
) , throughout the world, is a rare last name. The surname Сява is habitual in South Africa, where it is a very rare surname, Indonesia, and Australia. Measured by absolute frequency, it is the most numerous in Indonesia, South Africa, and India. Also, Сява is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Syava | India, Russia, Indonesia |
| Siava | Australia, Brazil, Bulgaria, New Zealand, India |
| Sjava | South Africa, United States, Ukraine |
| Сява | Kazakhstan, Russia |
| рэпер сява Russian rapper, RU (b. 1983) |
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