Who is polythemus in the story the odyssey?

Polythemus was the cyclops that trapped Odysseus and his men in his cave. Odysseus then got him very drunk and told him his name was Nobody. When Polythemus passed out, Odysseus and his men blinded him. The neighboring Cyclopses didn't help him becasue Polythemus screamed "Nobody is killing me!". When they get off the land, Odysseus shouts his real name to Polythemus in a fit of arrogance. Polythemus prayed to his father, Poseidon to prevent Odysseus from returning home to Ithica. He is also the son of Thoosa, a nymph.