In Stephen King's The Dark Tower series, the character Mordred Deschain is the son of Roland Deschain (White Father), the Crimson King (Red Father), Susannah Dean, (Black Mother), and Mia (White Mother), whose conception was facilitated by the demonic spirit who helped Jake enter Mid-World for the second time.
He also appears as a recurring character in the BBC television series Merlin, portrayed by Asa Butterfield as a child and Alexander Vlahos as an adult, where he is a young Druid with magical gifts similar to the titular character.