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Possibly the son of Thorin III Stonehelm. The son of Dáin II Ironfoot, he succeeded his father during the siege of the Lonely Mountain and ruled in the aftermath of the War of the Ring. He died during the Battle of Dale in TA 3019. The son of Náin and second cousin of Thorin II Oakenshield, Dáin II Ironfoot succeeded Thorin II in TA 2941. He was killed shortly afterward in the Battle of Five Armies along with his nephews Fíli and Kíli. Thorin II Oakenshield was briefly restored to the throne in TA 2941 after the death of Smaug. The son of Thráin II, he succeeded his father in TA 2850 as de jure king. The son of Thrór, he succeeded his father in TA 2790 as de jure king, and died a prisoner in Dol Guldur in TA 2850. In TA 2770 Smaug conquered the Lonely Mountain and forced King Thrór and the surviving Dwarves into exile and became the de facto king until his death. Contents 1 Biography 1.1 War of the Dwarves and Orcs 1. At twenty-four years old, Smaug took over Erebor, causing Thorin and his friends and family to retreat from their home. Thorin was the son of Thráin, older brother of Frerin and Dís, and the grandson of the ruling king, Thrór. Thorin II Oakenshield is the deuteragonist of the 1977 film, The Hobbit. He was a Dwarven King of Durin's Folk, the fifth King under the Mountain, and the Lord of the Iron Hills during the War of the Ring in Middle-earth. This article is focused on Rankin and Bass iteration of the character. In TA 2770 with the coming of Smaug, King Thrór was forced into exile until he was later murdered in Moria by Azog in TA 2790. Din II Ironfoot (or King Din ), the son of Nin and great-grandson of Din I of Durin's Folk. He returned to the Lonely Mountain following the death of his father Dáin I in TA 2589, he re-founded the Kingdom. The Dwarves settled in the Grey Mountains to the north west. The son of Thráin I, he abandoned the Lonely Mountain in TA 2210. He founded the first kingdom in the Lonely Mountain and discovered the Arkenstone. The King under the Mountain, also called the King of Erebor, was the hereditary title of the Dwarven ruler who resided at the Lonely Mountain. Thorin II Oakenshield was the rightful King under the Mountain. In The Hobbit, the dragon Smaug was held to be the only "king" of Erebor. The King under the Mountain was also by right the King of Durin's Folk.
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The King under the Mountain, also called the King of Erebor, was the hereditary title of the Dwarven ruler who resided at the Lonely Mountain. " … they grew immensely rich and famous, and was King under the Mountain again, and treated with great reverence by the mortal men who lived to the South, and were gradually spreading up the Running River as far as the valley overshadowed by the Mountain." - Thorin relating the outcome of his grandfather's return to Erebor
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