Percival or Perceval is one of King Arthur's legendary Knights of the Round Table. In Welsh literature his story is allotted to the historical Peredur. He is most famous for his involvement in the quest for the grail.

The above text is a snippet from Wikipedia: Percival
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!