Their deaths and Thorin's did not end Durin's line, although did end the branch which had Thror, Thrain, and Thorin Oakenshield. Thorin's cousin, Dain Ironfoot, became King after Thorin's death. Dain's son, Thorin Stonehelm, became King after Dain died in the Battle of Dale. The line continued on after that.
Thorin is the heir to the dominant line of Durin I, but Dain I Ironfoot, is also from the Line of Durin. His grandfather Gror is the youngest son of Dain I.
Originally Answered: Who is the king of Erebor after Thorin dies? His cousin Dain Ironfoot, Lord of the Iron Hills Dwarves. They are first cousins through their paternal grandfather.
Thorin was killed in the battle, as were his sister-sons Kíli and Fíli. As his "rightful heir," Dáin succeeded Thorin as King under the Mountain, and King of all of Durin's folk.
Thorin's Company of Dwarves AFTER The Hobbit | Tolkien Explained
Did Durins line end with Thorin?
Their deaths and Thorin's did not end Durin's line, although did end the branch which had Thror, Thrain, and Thorin Oakenshield. Thorin's cousin, Dain Ironfoot, became King after Thorin's death. Dain's son, Thorin Stonehelm, became King after Dain died in the Battle of Dale. The line continued on after that.
When Thorin died, he was buried with the Arkenstone. Orcrist was laid upon his tomb. The blade would glow blue if Orcs should approach; thus, they could not take the Mountain by surprise. Thorin was succeeded as leader of Durin's Folk by his cousin Dáin.
From TA 2989 to TA 2994, the re-colonization of Moria was an attempted expedition led by Balin to re-take the ancient Dwarven Kingdom of Khazad-dûm. An initial effort was successful in reclaiming some of Moria from the Orcs.
After the death of Thorin in the Battle of Five Armies, Dain becomes King under the Mountain. He redeems the Arkenstone from Bard with a fourteenth of the treasure, which is used to re-establish Dale. Over the next three years, Bard rebuilds the city of Dale and becomes its ruler. The city begins to prosper again.
Gimli is the son of Glóin who is introduced in The Hobbit as a member of Thorin Oakenshield's company, also being one of his four third cousins. Thorin himself is a direct descendant of Durin I, even becoming the King of Durin's Folk in his lifetime.
Gimli was born in the Ered Luin in the Third Age, son of Glóin. Gimli had wanted to accompany his father on the quest to reclaim Erebor, but at age 62 he was deemed too young. He was a remote descendant of Durin the Deathless, chief of the Seven Fathers of the Dwarves and ancestor of the Longbeards.
Durin is consternated, but agrees to ask his father, who listens to Elrond's proposition. The elder Durin rejects the offer, believing the Elves will take advantage of his people, and is angrily confronted by his son. Durin IV makes accusations that greatly anger his father, and is therefore stripped of his title.
Durin's Folk became a nomadic people in exile. Many of them went to the Iron Hills and settled there. Thrór went insane, leading to his death at the hand of Azog. This started the War of the Dwarves and Orcs, which ended at the Battle of Azanulbizar, where Azog was killed by Dáin II, grandson of Grór.
The Balrog killed Durin VI, the Dwarf-King of Khazad-dûm, whereafter it was called Durin's Bane by the Dwarves. Avarice, principally for mithril, drove the dwarves to go too deep and awaken the Balrog.
Dain Ironfoot is their distant cousin who is next in line for the throne after Thorin, Kili, and Fili. Since Thorin, Kili, and Fili all die at the Battle of the Five Armies, Dain Ironfoot becomes the next King under the Mountain.
With Thorin's death in the battle, Dáin became King of Durin's Folk and King under the Mountain, the first not of the main line. After the battle, Dáin thanked the Great Eagles for their timely intervention, crowning their chief with gold and swearing the Dwarves to everlasting friendship with them.
Gimli didn't know about Moria's fate because there had been no communication between Erebor and Moria for 25 years, and the Dwarves were hopeful and did not want to accept failure until there was certain news.
In the end Tolkien stated that there were probably "at most" seven Balrogs: In the margin my father wrote: 'There should not be supposed more than say 3 or at most 7 ever existed. '
After the battle, the Arkenstone was placed by Bard upon Thorin's chest within his tomb deep underneath the Lonely Mountain, and so was returned to the earth at last.
After the fall of Sauron, Thranduil fixed the southern boundary of his realm as the Mountains of Mirkwood, and his realm flourished well into the Fourth Age. He may have stayed on as the king of the Great Forest or left Middle-earth and departed to the Undying Lands.
At the end of the novel, The Hobbit, Balin has formed such a great relationship with Bilbo that he is the only dwarf to visit him with Gandalf a second time. Later in life, Balin led an expedition to re-colonize the lost dwarven kingdom of Moria. He was successful, and declared Lord of Moria.
