Board Thread:Speculation House/@comment-14138255-20141031002615/@comment-24994749-20141031022140

189.101.8.229 wrote: But... What. If Raven is Qrow's sister, then he isn't Ruby's uncle. I was guessing Summer was his sister, because that would make way more sense, since he thought Ruby how to use her scythe and she shows a connection with him, and Yang doesn't... Such an inconsistency. I have said before that Qrow could have been their "uncle" in name alone, just because he was a close friend of the family.

That said, being Yang's mother brother, he is Yang's biological uncle and Ruby's step-uncle. He was also in a team with their dad and given that Taiyang's second wife, Summer, was also an ex-team mate, he was likely good friends with both of them, so he could, again, be an uncle in the sense of a friend of the family. Also, he stick around when his sister didn't, so, again, he is more family than her, at least to the girls eyes.