Board Thread:General Grimm Discussion/@comment-173.13.242.113-20150514230244/@comment-64.26.116.245-20150611181738

Good point that Diana/Artemis was not just a moon goddess but a goodess of many other things, including hunting and virginity. Apollo was likewise a god of several other things, not just light and the sun, including music, poetry, healing, wisdom, and reason.

Helios was primarily a sun god, just as one of his sisters was specifically a moon goodess (Selene in Greek myth, Luna in Roman; Helios's Roman name was Sol).