As far as Greyhawk goes--Greyhawk had its own brand logo, with the WoG boxed set in 1983, but I don't think it was as strongly branded until after the first Dragonlance modules game out in 1984. I remember until Dragonlance the WoG modules still had the "plain vanilla" look that Goodman Games duplicated for their classic module lines, so DL did technically come first as being uniquely branded, but did have GH had branding with their modules before FR was published.
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