Hey, I found this post googling to find out if it was a reference to the story as well. Another similarity is the guild wars character “Gairwen” which is similar to Gawain? It also states in the wiki “Bercilak is a reference to a character from the Middle English romance, Sir Gawain and the Green Knight. The Green Knight in said story is garbed in green armor, seemingly immortal, and has the same name (though the name has varying spellings and pronunciations).” I really like references like this