Also you seem to be implying that the Uzumaki clan came first. And that's where he got his sealing jutsus from. But then where did he get his kenkkei genkkei from since the Uzumaki clan doesn't have ocular prowess or particularly powerful chakra.
You must be registered for see links
The Rinnegan may not require biological factors, at all. That could merely be a misconception of nearly all the characters in the series (spare for, perhaps, Madara - but he isn't talking too terribly much).
Also the only characteristics the Uzumaki have that really relate to the Sage are those that relate to the Senju as well.
You must be registered for see links
You must be registered for see links
Coincidence?
Danzo had powerful sealing jutsu. As did Chiyo. As did all of Akatsuki. As did Minato, granted his are Uzumaki in origin. As did a number of other persons who are not Uzumaki. You really can't use sealing jutsu as proof that some one has Uzumaki lineage.
The Uzumaki are known for a relatively 'barbaric' or 'wild' form of sealing jutsu. Such as the Dead Demon Consuming Seal and many of their more powerful jutsu coming at a sacrifice of some variety or another.
Seals like Danzo's and the Eight Trigrams seal used to seal Kurama are related to Taoism - a Hyuuga concept, however.
That leads me to wonder if there's a Hyuuga-Uzumaki relationship that will be revealed (possibly surrounding their cursed seal... perhaps it is applied with the Sage's staff, or something crazy like that).
Also who didn't have sealing jutsu despite being Uzumaki? Karin.
We don't know what jutsu she has or doesn't have.
What we do know is that Orochimaru inducted her as a sort of disciple and test subject. Expecting her to know sealing jutsu is a bit silly - since she's obviously been estranged from any family she has for quite some time, and it's questionable just how much jutsu her family took with them (if any).
And would Orochimaru be so reckless as to teach Karin - an Uzumaki - some of her family secrets? The main reason he kept her around was her odd ability to heal people and her sensory abilities. The only reason he let Sasuke get as dangerous as he did was because Orochimaru planned to take his body as his own. He kept Juugo locked in a cage and Suigetsu in a tank of water.
So it's unlikely that Orochimaru even told her she was an Uzumaki, much less gave her access to sealing techniques (wouldn't want that coming around to bite you in the rear).
Also those are rumors that the Hyuuga and the Uchiha are related. But if we look at the sage, then at his sons and we want to retain the theory that Hyuuga are related to the Uchiha. It would make more sense that the Byakugan is a watered down sharingan as both have the capability of seeing chakra. However the power granted with sharingan seems far greater than that of a byakugan. It seems unlikely a watered down kenkkei genkkei would be more powerful than it's full blooded predecessor. Especially sense the Uchiha seem to have greater ocular prowess and more powerful spiritual energy. It seems that the Hyuuga are an offshoot of the Uchiha/ Elder Son
I would argue that the Byakugan is not a 'watered down' version of the Sharingan, and that it is actually more powerful. For its ability regarding insight - it's far more capable than the Sharingan. For example - Hinata has a 10 kilometer radius of 359*359 degree vision that can penetrate just about anything. And she can see your chakra points (something no other ocular ability can do).
This insight has led to the family developing an art of fighting that allows them to attack, directly, the 'inner coils system.' This means that even Juubito could be rendered temporarily disabled by the '8 Trigrams, 64 Palms' technique.
"But Aim, the Mangekyo..."
Ah, yes, the Mangekyo.
This is that 'special chakra' that Tobirama spoke of. It's almost as if... as if a portion of the Juubi came along with the Sharingan, or, at the very least - its influence.
If the Byakugan and Sharingan are related... but the Sharingan seems to be relatively untainted by the influence of the Juubi....
That would lend some credence to the notion that the Hyuuga predate the Sage, no?