Board Thread:Speculation House/@comment-206.248.160.84-20160222060332/@comment-410526-20160222080249

If Ruby is a bastard, and she was born in (the) Vale, shouldn't her surname be Stone?

Okay but seriously I don't think there's enough evidence to say that Yang was a legitimate child either. Apart from us not knowing anything about Remnant's naming conventions, Yang would never have taken the Branwen name to begin with purely because Tai and Summer kept her actual parentage a secret, and the cat would kinda be out of the bag if she had the surname of neither of her parents.

I'd say it's equally likely that Yang was also born out of marriage, and they just gave her Tai's surname since Raven didn't want to have any part whatsoever in her upbringing.

As for why Raven left, I just get a feeling it's more likely to be either "fuck responsibilities, imma be a badass huntress" or a deep-cover mission that meant she had to disappear forever (or some combination of both) than something like Tai cheating on Raven.