Board Thread:Theories and Speculation/@comment-28939725-20161201164545/@comment-30631705-20161207115500

Thekillman wrote: Sasukesaradasakura wrote: Agreed, I always think about senju and uzumaki as one, through marriage, maybe. Considering that the Uzumaki seem ideal jinchuriki and share a powerful body as their "clan ability" with the Senju, i think they simply were one clan at some point that geographically separated and eventually developed differently. Ashura and Indra are still Otsutsuki, so it's not clear at what point these Otsutsuki clans became Senju and Uchiha clans. Ravenlot 27 wrote: He was called a Senju descendand only once During/after the Gokage summit, Obito talks about the conflict between the Sons and says something like "Hashirama and Madara, Naruto and Sasuke, Senju and Uchiha". It's not clear if he implies that Naruto's clan is essentially a Senju clan or whether it's mean to be symbolic (since Konoha accepted Senju ideology and are essentially Senju surrogates)

I think Otsutsuki became uchiha after Indra lost to Ashura and pursue his own goal.