Thráin

Thráin is a minor character featured in The Hobbit. He is the son of Thrór and father to Thorin Oakenshield and Dís and the maternal grandfather of Fíli and Kíli, and cousin of Dáin Ironfoot.

Background
Thráin was born in Erebor as the son of Thrór. He married a dwarf woman and had a son named Thorin. He was a middle-aged dwarf when Smaug invaded Erebor and Dale. During the War of the Orcs and Wargs, Thráin gave the map and key his father gave him to Gandalf, hoping the wizard would never give them to Thorin. During the Battle of Moria, after Thrór was slain, Thráin went to avenge his father's death. He restrained Thorin, refusing to lose his son like his father. He was last seen making a charge to the Dimrill gate and never returned. Apparently, he had been subdued by Azog, who cut off Thráin's forefinger and took one of the rings of Power for his master, Sauron.

Thráin was tortured in Dol Guldur and driven to madness.

Family

 * Thrór (father)
 * Mother
 * Wife
 * Thorin Oakenshield (son)
 * Frerin (son)
 * Dís (daughter)
 * Fíli (grandson)
 * Kíli (grandson)
 * Náin (cousin)
 * Dáin Ironfoot (cousin once removed)
 * Durin "the Deathless" (paternal ancestor)

Trivia

 * Thráin is based on the character of the same name form The Hobbit and The Lord of the Rings by J.R.R. Tolkien.