Too Many to Count.

In addition to the twelve most important gods, there were innumerable other gods in Greek mythology. Any list made of them would be very long and still be incomplete. Some were old deities whom the poets passed over as uninteresting, though they still attracted worshippers. Eileithyia, whose worship on Crete went back to the Stone Age, was still indispensible. Sea gods belonged to the periphery of Greek religion, though they also were very ancient. One of them, the Old Man of the Sea, is known under various names: Proteus, Phorkys, Nereus, or Glaukos, meaning "blue-green," the color of the sea. Anyone wanting his cooperation had to overpower him, which was difficult, for he could change from one form to another at the blink of an eye. Only Heracles, the strongman of mythology, had the muscular strength...