There apparently exists another clan of Au Ra that are older than both Xaela and Raen
Finally, I mention that in addition to the Xaela and Raen clans...there are rumors of a different, much older clan. (and...this is where Yoshi-P cuts me off).
http://forum.square-enix.com/ffxiv/t...=1#post3550637

Maybe we'll learn more about them in the future?