Belphegor - A demon of Sloth and Greed
Buzurivambavas is Bastard Demonspeak, and comes from the true Demonspeak bzhuu’vhambv’s, which means “carrying and crawling one”, or “one that carries and crawls”. They are a subtle kind of demon, and do not exhibit the terrible rage and bloodthirst of some other demons.
A kingdom where, if there are multiple princes (princesses can't rule unless they have no siblings), the princes fight to the death in the arena to decide who gets to rule. A simple way to make sure your brother cannot make a bid for the thrown, and keeps the royal blood in one line.