Board Thread:Lore Discussion/@comment-29522860-20160830022506/@comment-27447995-20160830164754

No concrete evidence, but I think that Gwynndolin being referrenced as both the 'God of the Darkmoon' and the 'Dark Sun' is just a nod to his gender dysmorphia (that is were secondary sexual traits, such as broad shoulders and facial hair or a high-pitched voice and breasts, of the opposite sex are present on an individual). He is the embodiment of an eclipse, a moon (his feminity and use of moonlight magic) overlapping a sun (his actual sex and only viable heir to the lord of sunlight).