Yvain
"Yvain, the Knight of the Lion" is a well known and documented story of a Sir Yvain in King Arthur's court. Before being known as the Knight of the Lion, Sir Yvain went on a mission to revenge the brother-in-law of King Arthur—and to win fame for himself. This trip lead to several more and, in the course of his travels, he jousted various knights, fought a few monsters, fell in love with a widow queen, lost his sanity—albeit shortly—and saved helpless women.