This gives me an idea. What if Minato came from a nomadic family who are/were direct descendants from the Sage of the Six Paths. And the Gold and Silver Bros where from said nomadic family as well. Not only that, but this "Namikaze Clan", if you will, has a genetic ancestry from The Senju, Uzumaki, Uchiha and Hyuga throughout their familial history. Though they'd probably have to be really, really, REALLY distantly related for MinaKushi to not be considered incestuous. This family lineage would form a pyramid structure like this:
****************************************************************Sage of the Six Paths************************************************************
*******************************************Senju**************************************************Uchiha******************************************
********************Uzumaki****************************************Namikaze***********************************Hyuga*************************
And no, I don't think this'll give NaruHina credibility whatsoever. I just added the Hyuga into this Lineage Pyramid to account for the previous notion that the Sharingan was an offshoot of the Byakugan. Though including the Hyuga into this diagram would still beg the question of why Obito never bothered to stock up on Hyuga DNA if this theory turns out to hold some water in future chapters. Then again, The Obi-Mada-Zetsu trio only focused on gathering Sharingans and Senju DNA for their own little genetic implementations. I don't think they ever bothered trying to get some Uzumaki DNA for all that matter.
Or, what if Minato was a clone/artificial human who's genetic code contains the preserved DNA samples of Senju, Uzumaki, Uchiha and Hyuga from many different time periods and the "enemies" of which Minato had that he didn't want Naruto to become the target of where the very people that created him. The genetic makeup would cause enough genetic diversity for MinaKushi to not be incestuous by nature as well as explain why Naruto's and Minato's Nine-Tails Chakra Modes display traits similar to the very founder of Ninjutsu and God of Shinobi himself, the Sage of the Six Paths.
Minato wasnt mentioned to be from a clan, kishi has already revealed all the clans to us. Plus, its nice to know that minato and sakura arent from a ckan and yet they were able to master fuinjutsu. And theyre really smart and strong.
The hyuga were dated back in the ancestry of the uchiha. But have had no relevance the the sage. The uzumaki/senju and uchiha are the two clans that had a major back story with. The hyuga clan hasnt been connected to the sage in a significant way. Thats why obito didnt go seeking the byakugan, but the rinningan since hes an uchiha. The hyuga are strong like hanabi, neji, his dad and hiashi and some other unamed ninjas from the clan but they arent really connected to the sage, the uchihas and uzumaki/senju are.