Board Thread:Fun and Games/@comment-30024199-20161026223139/@comment-26365564-20161227002804

There were several Easterling tribes. We particularly like the Easterlings from Jackson's adaptation; however considering these Easterlings didn't have any particular tribe name, and considering the possibility of there potentially being more than one Easterling faction being added in the far future, we decided to give them their own name to make them unique.

Based on many widely accepted non-canon sources (I know, how DARE I possibly go there) these Easterlings appeared to have the culture of a Khaganate, so we therefore call them a Khaganate. Golden is just an adjective, because the equipment they use has a golden appearance to it.