Elu Thingol is a fictional character in J.R.R. Tolkien's Middle-earth legendarium. He appears in The Silmarillion, The Lays of Beleriand and Children of Húrin and in numerous stories in The History of Middle-earth. He is a major character in the First Age of Middle-earth and an essential part of the ancestral backgrounding of the romance between Aragorn and Arwen in The Lord of the Rings.