example of the original – thus, various styles of emperors trace back to the Roman imperator (strictly speaking a republican military honorific), or the family surname Caesar (turned into an imperial title since Diocletian's tetrarchy). As the conventional use of king and its equivalents to render various other monarchical styles illustrates, there are many roughly equivalent styles, each of which may spawn a "great X" variant, either unique or becoming a rank in a corresponding tradition; in this context, "grand" is equivalent to "great" and sometimes interchangeable if convention does not firmly prescribe one of the two. Examples include grand duke and German Grosswojwod. Examples Antiochus III the Great, Hellenistic Greek king and the sixth ruler of the Seleucid Empire, bore the title Basileus Megas In medieval Serbia, Stefan the First-Crowned, likely Stefan Uroš I, Stefan Dečanski and Stefan Dušan had the title of "great king" (Велики краљ/Veliki kralj) See also Great Catholic Monarch Katechon Shahryar References 2nd-millennium BC introductions Achaemenid Empire Mythological kings Prophecy Royal titles Titles in Iran Titles of national or ethnic leadership