Board Thread:Lore Discussion/@comment-5632187-20130203042433/@comment-6003396-20131028085743

There is more than one god of war. There is Nahr Alma, which is associated with the Brotherhood of Blood (red invaders); and Faraam, which seems to be associated with the blue invaders that hunt the red, since the Guardian's Seal ring and Faraam armor set both start with the Warrior class.

Gwyn's firstborn could either be a third god of war, or he could be one of the ones mentioned in the leaked stuff from the beta.