Board Thread:Naruto Discussions/@comment-33156423-20170923231447/@comment-734582-20170924073333

Sarutobii2 wrote: It's never touched on but they're descendants of either Indra or Asura. The same goes for Ginkaku and Kinkaku. Exactly.

Though i think it's important to stress: Ashura's clan was Otsutsuki, the same for Indra. We don't know how big their respective clans became nor do we know when they transformed into their respective clans. But i think it's safe to say that after their death, some sort of reshuffle/reorganization happened, and the clans as we know them formed.

Considering their nature and name, i think the Kaguya clan is a collection of people from across the various descendants who yearned of the times before an ideology war.