伊萨克二世
Under Slavic rule, it became known as Ravno (literal translation to English would be "flat"), since it is in a flat river valley. Some local names (of the villages Paljane and Isakovo, of the river Mirosava) recall the major clash in autumn 1191 between the Serbs (under Stefan Nemanja) and the Byzantines (under Emperor Isaac II Angelos).