Durin's ring was a Ring of Power given by Sauron to the Dwarf Lord Durin III. Eventually the ring would be passed down the Line of Durin until it reached King Thrór who gave the ring to his son Thráin.
Sauron recovered the Seven Rings from information provided by Celebrimbor, and gave them to the leaders of the seven kindreds of the Dwarves: Durin's Folk (Longbeards), Firebeards, Broadbeams, Ironfists, Stiffbeards, Blacklocks, and Stonefoots, though a tradition of Durin's Folk claimed that Durin received his ring ...
Gimli, son of Glóin, is a Dwarf from the line of Durin of the Dwarves of Erebor. His father, Glóin, was one of the 12 dwarves who set out with Thorin Oakenshield in his quest to reclaim the Lonely Mountain from the dragon Smaug, as told in .
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.
In the extended edition of The Hobbit: The Desolation of Smaug, when Gandalf discovers Thráin in Dol Guldur, a flashback confirms that Thráin indeed possessed one of the Seven during the attempt to retake Moria, with Azog having cut off the top of Thrain's left index finger to take his ring.
The Seven Dwarf Rings of Power | Tolkien Explained
Who is Durin to Thorin?
Thorin I (Third Age 2035 – 2289, died aged 254) was the King of Durin's Folk for 99 years, succeeding his father, Thráin I, on his death in T.A. 2190. Thorin was the heir of Durin the Deathless being the great-grandson of Durin VI.
Durin's ring was a Ring of Power given by Sauron to the Dwarf Lord Durin III. Eventually the ring would be passed down the Line of Durin until it reached King Thrór who gave the ring to his son Thráin.
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.
Gimli is indeed a distant relative of Durin IV as his father Glóin traces his origins from the line of Durin of the Dwarves of Erebor. These were the Dwarves who dwelt beneath the Lonely Mountain and were one of the seven kinds of Dwarves (known as Khazâd).
Born in TA 2879, Gimli was the son of Glóin and a nephew of Óin, both former companions of Bilbo Baggins. He was a descendant of Durin the Deathless, father of the first house of the Dwarven people. Gimli was descended from, but was not a member of the royal line.
He is a Sindar Elf of the Woodland Realm and son of its king, Thranduil, becoming one of the nine members of the Fellowship who set out to destroy the One Ring. Though Dwarves and Elves are traditionally rivals, he and the Dwarf Gimli form a close friendship during their travels together.
This revelation refutes any lingering theories that The Stranger (Daniel Weyman), the man who fell from the sky at the start of the season, is in fact Sauron, with the finale confirming he's actually one of the Istari, Tolkien's version of Wizards.
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.
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.
Five of the six friends were recipients of the titular seven rings: Tayla Parx, Victoria Monet, Njomza, Alexa Luria, and Courtney Chipolone. Grande also tagged dancer Rim Taya Shawki in her promo image; the sixth ring recipient, Kaydence, didn't appear in Ariana's promo images for the video.
Durin IV was a King of Durin's folk who ruled the great Dwarven city of Khazad-dûm, and the fourth king to have the name Durin. Like his father he bore a Ring of Power.
Thrain I, Thrain II, and Thror are dwarves who live during the Third Age of the Sun and belong to the race of Durin. Durin's Line is one of seven original dwarf genealogies, and it's the main surviving Line after the end of the First Age. By the Third Age, even this family tree has shrunk in size.
He was never seen in Middle-earth after he left. The date of his death is unknown. Though Gimli's life story doesn't mention any children, there are tons of other dwarves in the world of Middle-earth. Gimli is certainly important among his people, but he wasn't the first, and he won't be the last.
Combining the poor communication between Erebor and Moria with the Dwarves' extended lifespans, Gimli might not have known about the fall of Moria simply because Erebor had not grown too worried about the lack of information yet.
In TA 2941, Gimli was prevented from traveling with his father on the Quest of Erebor because Thorin and Company thought he was too young, though Gimli, being in his sixties, considered himself ripe for adventure and was disappointed to be left behind.
The House of Durin was the line of the descendants of Durin the Deathless, eldest of the seven Fathers of the Dwarves. The kingship of the line continued even when those with the title were in exile.
However, in the Tolkien novel, Gandalf actually never knew about the Balrog. All he knew was that Moria had been evacuated because of something called Durin's Bane, and that it still lurks inside. And while he does know that Orcs attacked the Dwarven kingdom, it was many years ago, and so he hoped they were gone.
