Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-4010415-20150112013714

73.42.187.52 wrote: ^Both Yang and Ruby stated Qrow was their uncle, there is no "likely" about it.

However a relation to Taiyang is a stretch, people refer to unrelated people as uncle if they are raised with them as their uncle, so Taiyang, or either mom could be Qrow's sibling(because just as they didn't tell Yang that 1 parent wasn't her mommy you aren't going to tell toddler's that one has an uncle and the other doesn't, as long as Qrow cared for both as an uncle he is an uncle.

or his team could have been really tight, and they could refer to him as uncle because he is their parents brother-in arms. ^^^^^ THIIIIS! I wish more people would understand this!!

And I'm pretty certain that Qrow is Raven Branwen's brother. My reasoning?

1. Qrow (crow) and Raven, both names of black birds.

2. Most importantly: Back in 2013, a user named Montyoum edited the Qrow page to say Qrow's last name is Branwen.