Board Thread:Wiki Discussions Archive/@comment-32681188-20170805053048/@comment-27089028-20180111215839

Nowhere does it state the descendant has to be a direct descendant, the Uzumaki Clan are cousins of the Senju clan and while they are related they are seperate clans. Naruto, Nagato and Karin are all from the Uzumaki clan which means they share a common ancestor with the Senju i.e. Ashura. That's how Naruto came to be the transmigrant, he is not both Uzumaki or Senju just an Uzumaki.