Board Thread:Theories and Speculation/@comment-27541250-20160104022402/@comment-3965545-20160104072949

Madara was called the Second Sage of Six Paths and Nagato was called the Third Sage of Six Paths. Each had Rinnegan regardless of how along with Uchiha and Senju/Uzumaki chakra. I think having the dual Rinnegan(the Sage's eyes), Uchiha's dna/chakra and Senju/Uzumaki's dna/chakra qualifies you as a Sage of Six Paths.