User blog comment:ChishioKunrin/Grimm-mask Samurai Woman = Yang's Mother/@comment-107.72.162.119-20150214104118

Actually I believe that It's Yang's mother's color is red, the girls father is yellow, Ruby's mom was white and that would leave Qrow as black... Whose to say that all but the father are related. Summer may be a half sister of the other two, like Ruby and Yang are half sisters. I wonder if Yang's mom left because of something to do with either the Grimm or the White Fang? A dangerous mission that she couldn't bring a family into. So because she left Summer Rose helped to take care of her niece, and fell in love with Taiyang, then Ruby was born, and she died shortly after. Therefore Qrow could be both their uncle, equally. He may also have some contact with Yang's mother that we don't know about. (As for the eyes, maybe her father has lilac eyes and mother has red, so a yang has both, while Ruby obviously has her mom's eyes.) ;-) Since we still haven't seen the other characters, all of this is just conjecture.