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|"Thorin III" from The Lord of the Rings Trading Card Game|
|Other names||Thorin III|
|Titles||King of Durin's Folk|
King under the Mountain
|Birth||T.A. 2866 |
|Rule||T.A. 3019 - unknown|
|House||House of Durin|
|Gallery||Images of Thorin III Stonehelm|
During the Lordship of his father, Thorin was more than likely born in the Iron Hills to Dáin II Ironfoot. During his younger years he saw his people able to finally return to the Lonely Mountain after many years of further exile, and wandering. He himself became a prince with the rise of his father as King under the Mountain, and over all the Longbeards.
During the War of the Ring at the age of one hundred fifty-three, Thorin fought the Easterlings in the Battle of Dale, and took refuge in Erebor after his father was killed at its gates, along with Brand king of Dale. Thorin then became King under the Mountain.
When the news of Sauron's defeat in the South came to the ears of the enemy, they became dismayed and the Dwarves and Men came forth from the mountain and routed them driving them back of the river Carnen, never troubling them again.
Under Thorin's leadership Erebor and Dale were rebuilt along with Dale's new king Bard II, son of Brand, and once again both their people prospered, and their realms became close allies with the Reunited Kingdom of Arnor and Gondor of King Aragorn II.
During his rule Gimli, son of Glóin, led a number of Dwarves South to Aglarond, where a new colony was settled. Also during his rule mining for mithril in Moria slowly began again, although Moria was not yet permanently settled.
The origins of the name "Stonehelm" are mysterious: Tolkien doesn't provide us with any account that would shed light on its meaning.
 Portrayal in adaptations
2001-2007: The Lord of the Rings Trading Card Game:
- A Decipher card identifies one of the Dwarves at the Council of Elrond in The Lord of the Rings: The Fellowship of the Ring as Thorin III.
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix B, "The Chief Days from the Fall of Barad-dûr to the End of the Third Age"
- ↑ Chester Nathan Gould, "Dwarf-Names: A Study in Old Icelandic Religion", published in Publications of the Modern Language Association of America, Vol 44 (1929), issue #4, pp. 939-967
House of Durin
Dáin II Ironfoot
|King of Durin's Folk|
T.A. 3019 - Unknown
Eventually Durin VII
|King under the Mountain|
T.A. 3019 - Unknown