 Alternatively, a more idiomatic style may develop into an equally prestigious tradition of titles, because of the shining example of the original – thus various styles of emperors trace back to the Roman "imperator" (strictly speaking a republican military honorific), 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".