Hero of the Dutch romance Ridder metter Mouwen.
His mother was a queen, but he was raised in a monastery. During his numerous adventures, in which he overcame knights, giants, and beasts, he carried the sleeve of his paramour, Clarette, on the tip of his lance. He embarked on a successful quest to find his father. He eventually won the right to marry Clarette during a tournament at Arthur’s court.
His true name was Miraudijs.
Source
Die Riddere Metter Mouwen | Mid to late 13th century