This is completely full of win, thanks so much!
I think this is the best collection of info I've found so far about the inside cover chart, correspondence with the heralds and gems, and appearances in the chapter heads.
Now I suppose it is time to decipher what all of the connecting lines mean, the minor symbols, and what the symbols themselves mean
I've heard one theory that the major symbols on that chart could correspond to the hilts on their blade, which sounds pretty awesome.