When Tristan was born, his mother died due to the birth. Because of this, he was named Tristan, due to its meaning which is "sorrow". He grew up to become a noble knight, learning to hunt, joust, dance, play the harp, and be chivalrous. He became such a good knight, that he became one of the knights of the round table, and he was the hero of a few legends.
Isolde was the daughter of King Anguish of Ireland. Her mother healed Tristan after he received an awful wound while fighting King Mark's Enemy, Duke Morholt. She has more to her story, but that will be presented in just a minute.
The Famous tale
King Mark sent Sir Tristan to Ireland to get Isolde's hand in marriage on the behalf of the King. While in Ireland, Tristan slayed a dragon that was ravaging the land. Since he did such a good deed for Ireland, Isolde accepted the offer. To ensure the success of the marriage, the queen of Ireland prepared a potion to make Isolde and the King love each other passionately.