Family name Сяра (Siara 
, Syara 
, Sâra 
) , throughout the world, is quite a rare cognomen. The surname Сяра is characteristic of Tanzania, where it is quite a rare surname, Bulgaria, and Poland. In absolute terms, it most frequently occurs in Indonesia, Tanzania, and Poland. Likewise, Сяра is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siara | Tanzania, Brazil, Indonesia, Poland, United States |
| Syara | Brazil, Indonesia, United States, Malaysia, India |
| Sâra | Turkey, Algeria, Morocco, Egypt |
| Сяра | Russia, Bulgaria, Ukraine |