First off, if you’re at all interested in the heraldry of the World of Greyhawk, hie thee hence to Anna Meyer’s excellent site, where she has re-created all the classic heraldry from the Folio as well as creating new designs for various places, families, etc. The heraldry in this article comes from there.
I wanted to take a moment today to mention two symbols that are used in Greyhawk that might escape the casual notice of the reader. They are, interestingly, found on opposite sides of the continent.
First, we have the device known as a fret. This is known in real-world heraldry, and looks like a square at a 45 degree angle, with an X intersecting the box. It is only found in one context in the Flanaess, and that is as an identifier of all the members of the Iron League. I posit that it could be used as an identifier on flags, seals, etc. that represent the League as a whole.
Some representative samples; Idee, Irongate, and Sunndi.
Next, we have an example from the Baklunish lands. A common symbol in their heraldic designs is known as a cross cercelée, and is found at a 45 degree angle, like an X, but with curved ends on the arms. It is found in the arms of Ekbir, Zeif, and the Paynims, but not Tusmit or Ull, suggesting that it is a religious or cultural symbol, but not one universally recognized as identifying the Baklunish people.
The colors red, black, and yellow are, however, found in all Baklunish national heraldry save that of the Paynims (which is only yellow and black). It’s probably overstating the case that red is symbolic in Baklunish culture of settled, as opposed to nomadic, peoples, but it’s certainly something that a DM could build some significance around.