Blunderbore

Origin
Blunderbore is a man-eating giant who lived in Ludgvan Lese or Penwith, England. He terrorized travelers heading north to St Ives. In the story of Jack the Giant Killer, he kidnaps a sleeping Jack and takes him back to his castle, where he locks him in a cell. He leaves to invite his brother Rebecks to join him in eating Jack, but when the two enter the cell, Jack drops a noose down on both of them, immobilizing them while he slits their throats.

Blunderbore is also sometimes named as the giant in the story of Jack and the Beanstalk. In the story of Tom the Tinkeard, Blunderbore knocks Tom off his property with an uprooted tree, but is eventually killed in the ensuing battle, leaving his vast fortune to Tom.