Historically, most pre-Christian polytheist religions had pantheons that were led by some sort of all-father, or a mother-father pair. In the Indo-European pantheons, this was often a sky father and an earth mother type deities.
Given the division of the pantheons of the Flanaess into their racial origins, it seems interesting that we never really get a designation for which deities are the “leaders” of their respective pantheons. This is complicated by the existence of “common” deities that span all four pantheons found in the Flanaess.
For the Baklunish pantheon, Istus is the obvious choice. Not only is she the only greater deity in the Baklunish pantheon, but her portfolio as a goddess of fate and destiny (indeed, she could be seen as the incarnation of destiny itself) makes her a good choice.
For the Oeridian pantheon, there are only two deities identified as greater deities of Oeridian origin; Procan and Zilchus. Interestingly, most of the Oeridian deities are also common (with the exception of Delleb, Kurell, and Velnius). Neither Procan or Zilchus seems to have a domain that lends itself to leadership of an entire pantheon. I would go to the lesser god level and name Velnius as the chief deity of the pantheon. Not only is he a sky-god and presumably the father of the four sky-deities of the Oeridians, but it’s not impossible for a titular head of a pantheon to be eclipsed by a deity of greater power, as we see with the Germanic Wotan/Odin, who gradually took over the position of chief god from the sky/thunder god Donar/Thor in the real world.
The Flan deities give us an easy choice; Beory, the Oerth Mother. I’d also add the possibility that the Flan pantheon has a sacred couple consisting of Beory and Pelor, the sun god. It’s also interesting to note that all Flan gods are also commonly found across the Flanaess.
Finally we have the Suel, which are a tough nut to crack. Of the three Suel greater deities, Wee Jas might seem a likely choice, as both magic and death are fairly universal things (and would give an interesting parallel with Wotan/Odin as noted above, who is not only the god who seized the secrets of runic magic, but who also guides the dead as a psychopomp astride Sleipnir). Lendor is another possibility, but the way he’s portrayed seems to argue against the idea, as he seems to not be as energetic as such a figure might need to be.
What do you think? Do you distinguish between pantheons enough for such a thing to matter? If so, do you use it to explain rivalries and intrigues between the various priesthoods?