Black Knights were a group of terrorists in an anime called Code Geass, they also use their emblem from that anime.
And Roz Wei is eastern themed obviously and has been around for a few months, I might be wrong, but that could be the reason for "New" Wei Kingdom, or they are a modern incarnation of Wei. I don't know for sure,
http://codegeass.wikia.com/wiki/The_Order_of_the_Black_Knights