Thingol

 ( Grey Elves ) 

Thingol and Melian have a daughter, Lúthien, who in turn falls in love with the mortal Man Beren. Disapproving of their relationship, Thingol sets numerous quests that he thinks impossible for Beren, so as to prevent him from marrying Lúthien. One of these quests is to recover one of the priceless star-jewels, the Silmarils which Fëanor had created, and the Dark Lord Morgoth had stolen and set in his crown; but even that quest succeeds., ch. 19 "Of Beren and Lúthien"

Thingol fights several wars with Morgoth. He is suspicious of the Noldor Elves when they arrive in Beleriand, and refuses to assist them when they fight Morgoth. The hero of Men, Húrin, comes to Menegroth in his old age, lamenting the death of his son Túrin. In bitter rage he hurls the treasured necklace of the fallen Noldor city of Nargothrond, the Nauglamír, at Thingol's feet. Melian sees Húrin's thought, and deals with him gently; Húrin is sorry, and gives Thingol the Nauglamír. Thingol gets some Dwarves to set his Silmaril in the necklace. The Dwarves do so, but come to covet the unequalled work, and ask Thingol if they may keep it as payment. Thingol angrily refuses; offended, the Dwarves kill him and sack Menegroth. The Sons of Fëanor, who had sworn a terrible oath to recover the Silmarils on behalf of their father, later destroy Doriath to recover the Silmaril; they kill Dior, Thingol's grandson, the second and last King of Doriath., ch. 22 "Of the Ruin of Doriath"

Flieger states that Thingol's actions may seem unjustified thematically, but they make sense in terms of his politics and dynastic needs. She contrasts him with Beren, who though a Man is constantly drawn towards the light. With the return of the Noldor to Middle-earth, perhaps threatening his kingdom, Thingol's mood darkens. After he learns of the Elf-on-Elf Kinslaying at Alqualondë perpetrated by the Noldor on the Teleri, Thingol (Teleri himself) bans the use of their language Quenya in his lands, and Sindarin becomes the most prevalent Elven tongue in Middle-earth. He takes successively darker actions, moving further and further from the light, so that even when he receives the Silmaril from Beren, he knows neither how to appreciate it nor how to use it.

Robley Evans, writing in Mythlore, draws a parallel between Thingol and Fëanor: like him, he turns away from the Light, and chooses to remain in Middle-earth with Melian, who could stop time and its changes. Evans states that Thingol's marriage with Melian seems to "promise a model union of diverse created beings" on first impression. He comments that Thingol is however the "complementary opposite of Fëanor in Tolkien's structural counterpoint" in that he is ultimately destroyed by his own version of Fëanor's oath; the act of claiming the Silmaril recovered by Beren places his kingdom under the Doom of Mandos. This warned that the Elves would come to harm if they continued their rebellion against the Valar.

The Tolkien scholar Tom Shippey writes that Thingol forms part of the tightly-woven plot of The Silmarillion, each part leading ultimately to tragedy. There are three Hidden Elvish Kingdoms, including Doriath, founded by Thingol and his relatives, and they are each betrayed and destroyed. The Kingdoms are each penetrated by a mortal Man, in Doriath's case Beren; and the sense of Doom, which Shippey glosses as "future disaster", hangs heavy over all of them in the tale.

The medievalist Marjorie Burns states that Thingol gains "great power" through his marriage to Melian, writing that she resembles Rider Haggard's infinitely desirable Arthurian muse, Ayesha of his 1887 novel .