Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-25801533-20150901065221

Travis, I am sorry to burst your bubble but your first theory has zero ground to stand on. Its already been stated explicitly, in the show, that Ruby and Yang have different mothers. Its also been stated by Monty that they are half sisters. This leaves no room for interpretation or second guesses.

As for the second part many things that you brought up have already been confirmed and dont really fall into the realm of speculatory topics. The general consensus   is that Raven is assumed to be Yangs mother, however there is still a chance she is not. You are right that she is for sure related to Qrow in some manner, be it his sister or daughter.