Originally Posted by The Special One
I don't think the Uchiha or the Senju existed initially. The elder brother held the father's doujutsu while the younger brother received the father's enhanced physical attributes. Eventually, the two brothers broke off from each other, with the younger brother's clan eventually spawning the Senju and the older brother's clan eventually spawning the Uchiha.
A long time ago, Kishi hinted that the Hyuuga were ancestors to the Uchiha, so it's fair to say that the Hyuuga derived from the elder brother's bloodline, while the Uchiha emerged from the Hyuuga; if Kishi is to be credited for what was mentioned a while ago in the manga. Though that would have to mean the Hyuuga clan splintered as a result of the sharingan appearing in some fashion, allowing the sharingan to propagate itself amongst a group kept separate from the primary Hyuuga stock.
Also, the younger son's bloodline could have had several offshoots, Senju and Uzumaki being two of perhaps many. Just a theory... Though I suppose the same could be said of the elder son's bloodline.
I totally agree
I drew up this little piece
I agree with everything you mentioned and I think the mutation of the eyes is what caused the rift between Hyuuga and Uchiha. Hyuuga seem very respectful and humble in nature...Known as the strongest Taijutsu users in Konoah. They seemed to focus on their martial arts while the Uchihas through despair, hate, turmoil, love, loss evolved their eyes for power and position. Uchihas engaged in war and conflict while the Hyuugas remained peaceful and civil with other clans. As Tobirama mentioned Uchihas sacrifice love for power and were known as the most compassionate of people oddly lol. Hyuuga's remained peaceful though they did compete internally...otherwise within the Hyuuga compound you would not have a Main or sub branch.
Uchihas probably saw the Hyuugas as big headed assholes. Who were weak with resolve and unwilling to grasp their full potential. As they continued to discover their powers through dojutsus they understood the basic differences between each groups goals. Uchihas wanted to rule and Hyuugas weren't as ambitious. Uchihas were removed as a sub branch of Hyuuga and established themselves as their own individual clan. Also removing Hyuugas sleeping with Uchihas and mixing in that hate of the bloodline.
Senju and Uzumaki we have a little more detail about their background...Relatives who lived in dramatically different locations...Senju were of the forest and Uzumaki of the whirlpool. So my guess is these groups were separated for a long time. They hardly crossed paths. We really don't know much about Senju jutsu since Tobirama and Hashirama don't really share similar techs..Nor from what we saw of the parents...not much was passed down. So individual growth was based obviously on training since these are the descendants of the body younger son. Hashirama with the help of Madara grew to become the leader very quickly and mastered water and earth techs. Tobirama mastered water techs as well. I would say Senju are in favor of earth and water and Uchiha are in favor of fire and lightning. Uzumaki on the other hand focused on the ways of the Original sage. Sealing jutsus (Sage created) and expanding upon that base. Developing strong chakras and longevity as they didn't seem to have much conflict. The Uzumaki's were feared because they dealt with powers that were astonishingly similar techs originally used by the sage. Then they were wiped out and survivors divided up across the lands.
Just to edit Hyuuga are one of the oldest clans within Konoah and one of the four founding noble clans.
Hyuuga, Akimichi, Aburame and Uchiha are the Noble Clans with obviously Uchiha coming in last to sign the peace treaty. Though all of this was envisioned under the thumb of Hashirama and his adviser Tobirama.