Medea, daughter of the King of Colkhida, she betrayed her
father and helped Jason and his companions (Argonauts) to get Golden Fleece.
After that she fled with Jason. They had two children. Back in Greece Jason
fell in love with another princess and was going to marry her. To take
revenge Medea killed her children by Jason and burnt his new fiancée.
The image of Medea is very popular in fiction and fine arts. Different
authors depict her differently: some as an evil witch, others as a betrayed
unhappy woman.
See: Eugène Delacroix Medea
about to Kill Her Children.