Philosophers Works Grand Duke of Bosnia (Serbo-Croatian: veliki vojvoda rusaga bosanskog,[1] Latin: Bosne supremus voivoda / Sicut supremus voivoda regni Bosniae)[2][3] was a court title in the Bosnian medieval state, with its first holders being recorded around the middle of the 14th century.
To interpret it as an office post rather than a court rank could be equally accurate, and although it was retained for life by a nobleman who gained it, it was not meant to be hereditary, at least not at first.
[8][9] Unlike usage in Western Europe or Central Europe, as well as in various Slavic lands from Central to North-East Europe, where analogy between grand duke and grand prince was significant, with both titles corresponding to sovereign lower than king but higher than duke, in the Kingdom of Bosnia the title of grand duke corresponded more to the Byzantine military title megas doux.
[11] In that sense, although like in the rest of South Slavic neighbouring states and among its nobility, in Bosnia also existed the title knez and veliki knez, nominally analogous to prince and grand prince, it was ranked as a medium to major feudal landlord, with corresponding influence in the Bosnian Stanak (also Great Bosnian Rusag (Serbo-Croatian: "veliki bosanski rusag"), Whole of Bosnia (Serbo-Croatian: "sva Bosna")), which was institute of assembly of all Bosnian nobility, regardless of rank and status.
[8] Accordingly, the title Grand Duke of Bosnia was explicitly given by Bosnian rulers, whether ban, king or queen, to their highest-ranking military commander.