There was no cyclops character in The Goonies movie but there was a name cited as "One-Eyed Willy" who has the hidden treasures.
One-Eyed Willy via kwout
But if you are pertaining about the deformed manchild, he's name is "Sloth Fratelli" played by former NFL defensive linemen John Matuszak.
As per Tor.com, One-Eyed Willie’s pirate ship was a real set that was built to look like Errol Flynn’s ship in The Sea Hawk.
While it was being constructed, the kids were not allowed to see it; the ship was hidden on another set behind tarps. Donner was hoping to get a real reaction from the cast for their first take seeing Willie’s ship, but when he rolled the camera and revealed it, the whole gang was so shocked by the sight that they started cursing up a storm, and the scene had to be re-shot.
Once production wrapped, the crew tried to find someone who would take the ship, but no one wanted it, and the entire set was scrapped.
Remember Chunk from the '80s hit 'The Goonies'? There is no way you would recognize him today! Find out more at Aol.com.