
1) Arthurian character 2) Cornish folklore
Found on
https://www.crosswordclues.com/clue/cormoran

Cormoran (n or ən) is a giant associated with St. Michael`s Mount in the folklore of Cornwall. In local tradition he is said to have created the island, in some versions with the aid of his wife, Cormelian. From the island he raided cattle from the mainland communities. Cormoran appears in the English fairy tale `Jack the Giant Killer` as the ......
Found on
http://en.wikipedia.org/wiki/Cormoran

In English mythology, Cormoran was a Cornish giant who fell into a pit twenty feet deep, dug by Jack the Giant-killer, and covered over with grass and gravel. For killing the giant Jack was awarded a belt from King Arthur.
Found on
http://www.probertencyclopaedia.com/browse/D3.HTM
No exact match found.