Other Names: Thráin the Old
Location(s): Moria, Erebor
King of Khazad-dûm
King under the Mountain
Dates: III 1934 - 2190
Parents: Náin I
Children: Thorin I
Náin I slain. The Dwarves flee from Moria.
The Return of the King, LoTR Appendix B, The Tale of Years: The Third Age
[Said Thorin,] 'Long ago in my grandfather Thrór's time our family ... came back with all their wealth and their tools to this Mountain on the map. It had been discovered by my far ancestor, Thrain the Old....
The Hobbit, Ch 1, An Unexpected Party
Most of these that escaped made their way into the North, and Thráin I, Náin's son, came to Erebor, the Lonely Mountain, near the eastern eaves of Mirkwood, and there he began new works, and became King under the Mountain. In Erebor he found the great jewel, the Arkenstone, Heart of the Mountain.
The Return of the King, LoTR Appendix A, Annals of the Kings and Rulers: Durin's Folk
Elena Tiriel 7Oct05