Amalthea is the step mother of Zeus, and owned a goat, until Zeus skinned it when he was full-grown. She did not like to feed Zeus with her milk, so she worked with goat milk instead of her own.
Her name defines 'tender goddess' and is the loving step-mother of Zeus. Although, she was very upset that Zeus skinned her goat, despite the fact that Zeus has no memory whatsoever about him drinking it's milk.
Zeus is the god of lightning and now the king of the gods and Mount Olympus. He is the most major god there is.