Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-14909251-20150727215208

DiegoAnime3000 wrote: The question is, Kunrin, why did the girls think he was their uncle?

Qrow Branwen. Not Xiao Long, not Rose. In other words, no biological relation to the family, or at least, not one that the girls know of.

"Uncle by familiarity" would explain it though. How did Qrow realize that Ruby and Yang left their house? He probably entered the house only to find it empty. This could mean that Qrow is simply a close friend of Taiyang in the girls' eyes and he regulary paid a visit to check on his friend who had lost his wife and shut down. They may have simply been told that he was their uncle and, being little kids, didn't think to ask such complicated questions. At the time Yang learned the truth she was still quite young and Ruby was even younger obviously. Yang probably followed her dad's lead in calling him her uncle and Ruby would have just taken after her sister in calling Qrow her uncle as well. Even if they were not told of his biological connection, they may have simple presumed there was one or just never contemplated on it at their age.