Son of Beren and Luthien; heir of Thingol. Dior was born in 470 of the First Age. His father Beren was a Man of the House of Beor. His mother Luthien was the daughter of the Elvenking Thingol of Doriath and Melian, a Maia from the Undying Lands. Dior was the first of the Peredhil, or Half-elven. Beren and Luthien settled on the island of Tol Galen in the River Adurant on the southern border of Ossiriand in 469. Their son Dior was born there the next year. In 497, Dior married an Elf of Doriath named Nimloth, who was the niece of Celeborn. Dior and Nimloth lived in a house near Lanthir Lamath, a waterfall in the Adurant. Their twin sons Elured and Elurin were born in the year 500, and their daughter Elwing was born in 503. Dior succeeded his grandfather Thingol as King of Doriath, and he relocated to the halls of Menegroth with his family. He was welcomed by the Elves of Doriath and he hoped to reestablish their realm. In autumn of 503, a messenger from Ossiriand brought the Silmaril to Doriath, and Dior realized that Beren and Luthien had died. When Dior wore the Silmaril around his neck, "he appeared as the fairest of all the children of the world, of threefold race: of the Edain, and of the Eldar, and of the Maiar of the Blessed Realm." The realm of Doriath was temporarily revived while Dior had possession of the Silmaril. The sons of Feanor sent a message to Dior staking their claim to the Silmaril which had been made by their father, but Dior did not respond. At Yule in the year 506 to 507, the sons of Feanor attacked Doriath and there was a battle in Menegroth. Dior killed Celegorm, but he was slain along with his wife Nimloth and many of his people. The realm of Doriath was ruined and never arose again. Dior's six-year-old sons were abandoned deep in the woods by Celegorm's servants. It is not known what became of them, but according to one tale they found their way back to Ossiriand. Elwing was rescued along with the Silmaril by a few survivors of Doriath and they settled at the Havens of Sirion. Elwing later married Earendil and had twin sons, Elrond and Elros. The name Dior means "successor" in the dialect of Doriath from the root ndew meaning "follow, come behind." He was also called Dior Aranel the Beautiful and Dior Eluchíl. Aranel means "royal Elf" in Sindarin from aran meaning "king" and el meaning "Elf." Eluchíl means "heir of Elu." Thingol was known as Elu Thingol and the word hîl means "heir" in Sindarin.