Board Thread:Naruto Discussions/@comment-26708623-20161103021652/@comment-734582-20161103082812

He only had so much time to tell stories. A page spent on this stuff is a page not spent on the main story.

The Uzumaki are related to the Senju and trace back to Ashura. Probably split because Ashura's clan spread across the world. IE the Raikage and Gold and Silver brothers have traits similar to the Senju (strong and resilient body). The village got destroyed because their sealing techniques were a threat to the biju balance of power, possibly by collaboration of multiple nations.

If other Uzumaki survivors exist, they're still hiding.