Board Thread:Naruto Discussions/@comment-32685487-20180610182908/@comment-27821571-20180611230059

Nagato is just a Uzumaki (and if he has any non-Uzumaki blood, it must not be much).

However, the Uzumaki clan are already distantly related to the Senju clan, along with the Uchiha, Hyūga, and Kaguya clans.