Talk:Raven Branwen/@comment-4010415-20150126144152/@comment-4010415-20150329021142

No, we don't know that Summer is Qrow's sister. It hasn't been said anywhere that Summer is Qrow's sister.

I assume you said this because Ruby called Qrow her uncle, but guess what. Yang called him "our uncle." Meaning both Ruby and Yang consider Qrow to be their uncle.

But Qrow is not Taiyang's brother because Taiyang's last name is Xiao Long and Qrow's is apparently Branwen. Ruby likely considers Qrow her uncle by familiarity, as in she's developed such a close bond that she considers him family even though they aren't blood related.

Qrow (Branwen) and Raven Branwen are siblings.