Mercurius
Legend
Yes, that was one of my resources - sort of "ground zero," if you will.I don't know what methodology (if any) Wikipedia is using, but this is their take on D&D settings, up to 2020;
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Two it lists that I didn't include are Dragon Fist and Mahasarpa. I didn't include them because they are online only, and it just didn't feel like they quite made the cut as even minor settings or "row worthy" (think Elaine from Seinfeld).