I haven't found any mention of Zorquan, draconic god of "dragon-ness" (perhaps most famed as a critic of the draconic holy wars), except the two books Draconomicon (1990), & Cult Of The Dragon (1998).
Information found there is scant, but old campaign notes I've seen bore enough similarities, to make me wonder if some other publication from that time, mentioned Zorquan?
Looking for any published sources: Modules, novels, magazines, videogames, comics, Spelljammer (or even Pathfinder?) modules or other material from other franchises, literally anything that might have been printed with the name "Zorquan" in it.
Is there any other Zorquan-related material, beyond the entries in these two books?
Best Answer
Monster Mythology
In DMGR4 Monster Mythology p.128 there's a brief mention of Zorquan:
Forgotten Realms Campaign Setting (1993)
In the AD&D 2nd edition Forgotten Realms Campaign Setting boxed set, in Running the Realms p.63-64, "Other Nonhuman Deities":
This is about all of it, other than FOR1 Draconomicon and FOR11 Cult of the Dragon, which you mentioned.