Zeus is the not only the god of the sky, lightning, thunder, law, order and justice, but he is also the father of his sister Demeter's baby, Persephone. Poseidon, God of the sea, earthquakes, storms, and horses, is also the brother of Demeter, Poseidon was also known to have raped Demeter and Demeter bore him two children, the names aren't shown here. Hades, King of the underworld,God of the Dead and Riches, is another brother of Demeter, Hades is known for taking Persephone. In today's family tree, this would make them all the uncles of Persephone, the daughter of Demeter and Zeus.