Dior is the son of Beren and Lúthien. After Thingol is killed by the dwarves of Nogrod, Dior moves to Doriath to rule the Sindar, accompanied by his wife Nimloth and their children Elwing, Eluréd, and Elurín. Dior receives the Silmaril after his parents die, and the sons of Fëanor kill him and destroy Doriath while trying to fulfill their oath and reclaim it.