Wikipedia
Velikaš
Velikaš (, velikaši/великаши) is the Serbo-Croatian word for " magnate", derived from veliko ("great, large, grand"). Another word is velmoža, which was commonly used for provincial lords (oblastni gospodari). It was used for referring to the highest nobility of Serbia in the Middle Ages and Croatia in the Middle Ages while the highest nobility in Bosnia were called baruni (barons). It is the equivalent of boyar, used in Eastern Europe.
Titles used by the higher nobility include vojvoda (general, duke), veliki župan, etc.