When king Arthur was young and innocent he fell in love with a young maiden or rather he was seduced by her. That maiden name was Morgause they made love together and from that love they had a child that child name was Mordred but soon king Arthur and Morgause found out that they were actually haft siblings and it was a terrible sin to have a child between siblings, Merlin who was a great prophet told king Arthur about a prophecy that one day his evil son will one day kill him so Merlin told king Arthur that he should get rid of every noble male babies that were born on may day and that's what King Arthur did by putting them on a coracle and letting the sea take care of them .
from all 40 babies only one survived and that baby was Mordred fisher-father found him and together with fisher-mother they took care of Mordred for six years at first they didn't new nothing about Mordred so they named him tad but one day a young maiden wearing a green gown and riding a charger came to fisher-mother hut and told everyone there the truth about Mordred and took him away the young maiden name was Nyneve she left into the forest with Mordred and then arrived at Lothian where Mordred mother Queen Morgause lived along side his fake father king Lothe Nyneve left Mordred at their care and left but before she left she gifted Mordred with a white brachet who Mordred named Gull.
Mordred lived at Lothian for five year but finally the day came where he left to see his real father king Arthur so he headed to Camelot but when he got there king Arthur had left from may day and had gone by himself somewhere. the next day they saw each other but king Arthur didn't see him as his son but instead as a warrior and made him a knight of the round table alot of time pass by but king Arthur and mordred never talk as father and son