Pelican in her piety = Pelekus = Labrys = the double headed axe Zeus Labraundos used to invoke storms = the symbol of the Amazons, which likely goes all the way back to one of the oldest Egyptian gods Nieth.
Here’s a bit of info on Nieth:
“A religious silence was imposed by ancient Egyptians for secrecy, employing euphemisms and allusions and often relying on symbols alone. In her usual representations, she is portrayed as a fierce deity, a woman wearing the Red Crown, occasionally holding or using the bow and arrow, in others a harpoon. In fact, the hieroglyphs of her name usually are followed by a determinative containing the archery elements, with the shield symbol of the name being explained as either double bows (facing one another), intersected by two arrows (usually lashed to the bows), or, by other imagery associated with her worship.”