User blog comment:Thetwindler/God vs. Jack/@comment-3045936-20190423031951/@comment-3045936-20190423041045

Angels are his creations. Humans and their souls are his creation. While Nephilim isn’t something he made directly. They are made directly from his creations, and would have at least a theoretical knowledge of its nature being made up of two things he made. True he might not know all about a Nephilim. But I assume he knows them better than anyone else, given their angelic and mortal origins.

If a Nephilim was from something like a Creation of Amara. Than he wouldn’t have a pre-existing working knowledge of “any” of its parts.