
Vlastelin

Vlastelin vlastelini) is the Bosnian (Serbo-Croatian word for the "magnate", derived from "vlast" ("rule, power, authority, government, management, office"). Other words are "velmoža" and "velikaš", sometimes used interchangeably, particularly to designate "regional lords". "Vlastelin" was used when referring to the highest and most powerful nobility in medieval Bosnia. Also, in Serbia and Croatia of the era, the "velikaš" and "velmoža" were most likely terms used in place of "vlastelin".
From "vlastelin" the term "vlasteličić" was derived for lower or lesser "vlastelin" status.
In Eastern Europe the equivalent term would be boyar.
Titles used by the higher nobility in medieval Bosnia include "Grand duke" (person in command of military) in Bosnia specifically Grand Duke of Bosnia, "Knyaz", "Duke", "Prince", etc.
Magnates in Bosnia.
Magnates with Bosnian court titles: