Thráin the Old

King of Dúrin´s Folk for over 200 years (T.A. 1981-2190), Thrain the Old (as he was called by Thrain II) led the Dwarves from Khazad-dum and into Erebor, where in T.A, 1999, he founded the Kingdom under the Mountain. Deep within the Lonely Mountain, Thrain I discovered the Arkenstone, an heirloom of Durin's House which was later lost to Smaug and then recovered by Bilbo Baggins.