Board Thread:General Discussion/@comment-4349034-20170325212113/@comment-1038387-20170325212734

But as to your question... I don't think it was ever made explicit that's where her powers came from. Her tagline was "Beautiful as Aphrodite, wise as Athena" etc, but it never said it was a gift from Aphorodite or any of the others. Clay Diana was given life by Aphrodite, IIRC. Hercules and Hermes definitely had no part in it.

The explicit connection between her powers and gifts from the Gods seems to be a post-Crisis thing.