Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-24994749-20140528192428

I also have a theory around this.

I think Yang is actually Cinder's and Qrow's daughter (just that she doesn't know it) 'cause Cinder also seems to have a fire semblance (asuming semblances are genetical). Cinder went "evil" and her and Qrow broke up. For Yang's safety, Qrow hid her with "Summer Rose" who was married to a Mr. Xiao Long (hence Yang's receiving his last name) who also had a fire semblance so it was beliable to pretend Yang was their daughter. Sometime later, Xiao Long died of whatever causes. Ruby was born after his death while Summer was still "officially single" so she received Summer's last name. Qrow is actually Ruby's father just that she was the result of a romance between him and Summer Rose that was never made public, instead, he remains as an "uncle" to her.