Board Thread:Speculation House/@comment-108.69.217.22-20160216061533/@comment-16502426-20160217042414

Yang herself seemingly didn't know until after Summer died. So I suppose it's possible that Ruby is unaware. It would be odd for her never to have known how Qrow was "uncle Qrow", but it's always possible that they just implied to her that he was Taiyang's brother, and she never asked.