Hearing of greater riches in the Grey Mountains (Ered Mithrin), he decided to leave the Lonely Mountain with the greater part of his folk, along with the dwarven treasure: The Arkenstone, leaving the mountain abandoned for over three-hundred years until his descendent Thrór reclaimed it. He was succeeded as king by his son Glóin.
His grandfather was Náin I the last ruler of Khazad-dûm before he was killed and the rest of his people driven out by a Balrog. He was also a sixth generation relative of Thorin Oakenshield, his namesake. Thorin Oakensheild died at the Battle of the 5 Armies.
| King of Durin's Folk |
TA 2190 - TA 2289
| King under the Mountain |
TA 2190 – TA 2210
|Dwarves of Middle-earth|
Azaghâl | Balin | Bifur | Bofur | Bombur | Borin | Dáin I | Dáin II Ironfoot | Dís | Dori | Durin(s) | Dwalin | Farin | Fíli | Flói | Frerin | Frár | Frór | Fundin | Gamil Zirak | Gimli | Glóin, King of Durin's Folk | Glóin | Gróin | Grór | Ibûn | Khîm | Kíli | Lóni | Mîm | Náin | Náin I | Náin II | Náli | Nár | Narvi | Nori | Óin | Ori | Telchar | Thorin I | Thorin II Oakenshield | Thorin III | Thráin I | Thráin II | Thrór