Who is the youngest of the 13 Dwarves in The Hobbit?
Fili and Kili in The Hobbit
In the story, Fili and Kili, are almost always mentioned in conjunction with each other. They stay close to each other and are often standing together with their uncle, Thorin. As the youngest of the dwarves with the keenest eyesight, they are often given unique roles and tasks.
Kili was born in the Blue Mountains in the year 2864 of the Third Age. He was the son of Dis, the younger sister of Thorin Oakenshield. Kili had an older brother named Fili, who had been born in the year 2859.
Thorin was 17 years older than Balin and 21 years older than Dain, yet they made him appear younger in the films. Perhaps it's just as in men some look older than others. Dwarves on average live to be 250 years of age. A 30 year old Dwarf is very much considered a young stripling, having not yet reached full adulthood.
Bombur was one of the Dwarves of Thorin's company who journeyed to Erebor to challenge the dragon Smaug. Bombur's distinguishing characteristic was his size, for he was the fattest of the thirteen Dwarves.
TL;DR: Thorin is half-elf, and Fili and Kili are themselves both part elf and half-human. The two young dwarves represent the union of Elves, Men, and Dwarves that once existed before Dale fell, and which will rise again.
After supper, Fíli and Kíli played small fiddles that they had brought in bags. The brothers were the youngest of the company by some 50 years, with Kíli being five years younger than his brother. Although not twins, the two brothers were inseparable throughout the adventure.
Kíli is stabbed to death by Bolg, and a heartbroken Tauriel returns the talisman to his lifeless hand. Tauriel stayed there, mourning over his death before Thranduil came upon the pair.
Fili and Kili, two heirs to Erebor's throne, were killed in the same battle, with Fili being captured and executed. Many of the dwarves, such as Bombur, Balin, Dori and Nori, survived the events of The Hobbit and remained in the reclaimed kingdom of Erebor.
Gimli is 139 during the events of The Lord of the Rings. Dwarves have an average lifespan of 250 years; thus, being young and strong, he was selected by Elrond to represent the Dwarves as part of Frodo's company.
Of course, not all of The Hobbit dwarves are alive by the end — Thorin Oakenshield, Fíli and Kíli all perish during the climactic Battle of Five Armies. The Hobbit dwarves Óin, Balin and Ori all die prior to The Lord of the Rings, when a colony is sent from Erebor to reclaim the Mines of Moria.
Fíli and Kíli were Dwarvern brothers and were also the youngest of the thirteen Dwarves who set out with Thorin Oakenshield's company, along with Gandalf and Bilbo Baggins, to reclaim the Lonely Mountain from the dragon Smaug.
Tauriel admits her love for Kili in The Hobbit: The Battle of the Five Armies. Tauriel leaves Thranduil and accompanies Legolas and Bilbo to Ravenhill in order to warn Thorin, Dwalin, Fili, and Kíli of an upcoming attack led by Bolg. She successfully finds Kíli and the two battle against Bolg together.
Sometime after the Battle of the Five Armies, Kili wakes up in the Caribbean with Tauriel mysteriously appearing with him. After several years of living together, the two finally marry. The duo is later shanghaied into service aboard Queen Anne's Revenge under the fierce command of Captain Blackbeard.
But on 10 November T.A. 2994, as Balin went to look in Mirrormere, an orc archer fatally shot him. Balin's body was placed in a tomb in the Chamber of Mazarbul. But the archer was just the van of the orcs who came up the Silverlode. The Dwarves were trapped.
Thórin Oakenshield was born in TA 2746 and was 195 years old when he perished in the Battle of Five Armies in the book. In the film trilogy, he was born in TA 2837 and was 104 when he was killed by Azog the Defiler.
With Tolkien dwarves having an average life expectancy of 250 years, he was late middle aged to old. A life expectancy of 250 years means aging about 3,5 as slow as humans, especially in a world in which there are no modern medicine. 250/3.5 = 71.42, making Thorin about 55 in human years.
Although very little is known about the identity of Legolas' mother, she is referenced a few times in The Hobbit films, and a big part of the source of contention between Taurial and Thranduil is that she thinks him cold and unfeeling, and he thinks her naive and foolhardy.
While Thranduil didn't have a problem with Dwarves, he didn't care for a lot of Elves. In the book, Thranduil was an isolationist and with good reason. Thranduil was a Sindarin Elf, which meant that he had never been to Valinor, and he grew up in Doriath under the leadership of King Elu Thingol and Melian the Maia.
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.
