Thread:Astarothfan/@comment-27083298-20170611064602/@comment-30924344-20170614075230

Also Ishibumi used the British meaning of Duke for Agares: "A duke (male) (British English: /djuːk/ or American English: /duːk/) or duchess (female) can either be a monarch ruling over a duchy or a member of the nobility, historically of highest rank below the monarch." Because in 72 Pillars there are many Dukes, Ishibumi named the clan "Chief Duke" to make them top Duke. Same with Bael as to why he named it Great King.