Who is Milun from The Lais of Marie de France and what is their importance?

Miluna ppears in Milun. Milun is a brave knight who fathers a child with a noble damsel, and then helps her hide the child and send it to be raised by her sister, before leaving to go to battle. Milun is later reunited with his child, a son who has grown to be a valiant knight, and with his love when her husband dies.