Board Thread:Wiki Discussions Archive/@comment-32681188-20170805053048/@comment-734582-20180112063502

Actionmanrandell wrote: he was the creator of the senju clan No, he wasn't.

Some time after Ashura's time the Senju clan was founded. Besides, the entire clan doesn't need to be a direct descendant. It's possible that Nagato and Naruto share a grand-grand father (or similar) who was a direct descendant of the Sage, without that relation being shared by the rest of the Uzumaki. The Senju and Uzumaki had good relations, so it's also possible that a few senju interbred with them (e.g. Nagato could've had a senju parent or grandparent). Keep in mind that the naming convention is that you take your father's surname. But a mother will give Senju genes just as well. So if a female Senju marries an Uchiha, the kid will be Uchiha even though the kid is also senju.

Besides, Naruto wasn't supposed to be an Uzumaki but a Namikaze. Yet he has Uzumaki genes.

And lastly, Obito was pointing out that Naruto and Sasuke were part of a larger Senju-Uchiha conflict. He didn't mean that Naruto is literally a senju. Although being a transmigrant, he probably has the genes anyway.