Board Thread:Naruto Discussions/@comment-24120130-20140529221750/@comment-11945215-20140531101437

since she has the byakugan,it's safe to presume that she and her sons were the earliest ancestors of the clan! but which one of her sons is unknown! unless hagoromo had a third son/daughter, i highly doubt that he is the main ancestor of the hyuuga after kaguya!but the mystery of the sage's brother,his identity and abilities,provides a good probability that he inherited the byakugan and his decendant's were the famed hyuuga clan.hence the main ancestor for the uchiha,senju,uzumakiand hyuuga is kaguya and the shinju (since kaguya ate the forbidden fruit of the shinju and gained it's powers)! i hope it helps!