What is "cormoran"

Cormoran ( or ) is a giant associated with St. Michael's Mount in the folklore of Cornwall. Local tradition credits him with creating the island, in some versions with the aid of his wife Cormelian, and using it as a base to raid cattle from the mainland communities. Cormoran appears in the English fairy tale " Jack the Giant Killer" as the first giant slain by the hero, Jack, and in tales of " Tom the Tinkeard" as a giant too old to present a serious threat.