User blog comment:PcRetro/So are Sternritter Human or not?/@comment-26420452-20131007043515/@comment-11051098-20131012000335

I think the Sternritter are most likely the strongest among all Quincies, chosen by Yhwach and given a letter and epithet based on a special skill. It seems logical to assume they are all Echt Quincies, but whether they are the descendants of the Echt Quincy families, I think it's too early to make assumptions on that.

Either way, I think the Sternritters are all real Quincies, maybe except BG9, I don't know what he really is.