Board Thread:Theories and Speculation/@comment-1512913-20150131165206/@comment-1018594-20150131204551

Elveonora wrote: Doesn't Jin no Sho clarify about Kinkaku and Ginkaku's relation to Hagoromo? I don't know xD ButI'd bet they are super distantly related, though.

It said they were in fact related to the Sage, but that's about it.