After reading the Why Bloodraven is not the Three-Eyed Crow thread, I started thinking about the corn references and remembering some old wordplay possibilities around crown / crone / corn and crow. I think you may be onto something with this: I think this is especially true if that character has a real or symbolic destiny as a king or queen. This is consistent with the Corn King allusion brought up by Ser Creighton, above, although the symbolism seems to go beyond that allusion.