Family name Тяна (Tiana 
, Тяна 
, Tyana 
) , throughout the world, is a common surname. The family name Тяна is habitual in Bulgaria, where it is quite a common surname, Madagascar, and Indonesia, where it is quite a rare surname. More frequently, Тяна is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tiana | Indonesia, Australia, Madagascar, United States, Brazil |
| Тяна | Kazakhstan, Russia, Ukraine, Bulgaria |
| Tyana | Indonesia, Australia, United States, India, Brazil |