What I meant is that some people (I don't mean us, but the happy Gloranthians!!) could "rationalize" the problem this way as it allows them to understand how various local gods could all relate to a single celestial manifestation. Obviously, their god would have been born from the heart, head or genitals of Orlanth's victim, while the neighbors' sun god would have been born of a foot, the entrails of other disgusting part... For the more "ecumenically oriented", they could even envision the relation between all this regional Sun gods on the model of the many-handed sun disk of Akhenaton, one and many at the same time.
Actually I am not trying to find a solution but only to imagine various possible cultural models for the sake of confronting the players with them. it is always nice to stage a theological debate in game (before hacking and slaying the heretic to loot his corpse obviously). 😀