The local population descends from the Slavs who mixed with Illyrian and Celtic tribes in the early Middle Ages, and therefore the dialect in its earliest mediaeval form has been rather influenced by the Celtic and Illyrian languages, the remaining of which are some local toponyms of Illyrian or Romanized Celtic etymology, such as Tara Mountain, Negbina, Murtenica, Čigota etc., or the mediaeval Užican personal name Brajan of Celtic origin.