Family name Sienta (Sienta 
) , in the world, is a rare cognomen. The last name Sienta is characteristic of Indonesia, where it is a very rare surname, Brazil, where it is an extremely rare surname, and the United States. Likewise, Sienta is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sienta | Indonesia, South Africa, Spain, Brazil, India |