Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-4010415-20141206080738

My main theory is that Raven is Yang's mother and Qrow's sister, which is why Ruby and Yang refer to Qrow as their uncle. He's Yang's uncle by blood and Ruby's uncle by familiarity, but they didn't know that he's only Yang's uncle by blood until after Summer's death, when Taiyang finally told Yang about her real mother. After all, Yang thought Summer was her mother because she didn't know about her real mother until then.