Summary. Aragorn's age in The Lord of the Rings is 87, thanks to his Dúnedain heritage. The Dúnedain have longer lifespans than ordinary men, but not as long as Elves. Aragorn becomes the High King and lives to be 210 years old before passing away.
He died at the age of 210, after 122 years as king. The graves of the hobbits Merry and Pippin (who had died in Gondor 58 years earlier) were set beside his. He was succeeded on the throne by his son, Eldarion.
In one of the texts in The Nature of Middle-Earth, Tolkien writes that Eldarion would have lived 120 years, and that his descendants would have lived longish life spans for normal humans (about 80–85 years) but not more than that.
The Tale of Aragorn and Arwen, an appendix to the main story, relates that Aragorn and Arwen had a son, Eldarion, and at least two unnamed daughters. One year after Aragorn's death, Arwen dies at the age of 2,901.
However, he does not possess the ability to live forever, and he cannot choose to be mortal or immortal like Arwen, the half-Elf he loves and eventually claims as his wife. Because Aragorn is mortal and Arwen chose to remain in Gondor and become mortal, their son, Eldarion, is mortal as well, despite his Elven lineage.
Aragorn's heritage is the reason for his longevity, and he's not the only Lord of the Rings character to benefit from being one of the Dúnedain (and not, as some believe, part Elf). Faramir (David Wenham), for instance, carries the blood of the Dúnedain as well, which is why he's able to live to the age of 120.
Fourth Age. In the year 121 of the Fourth Age, after Aragorn's death, Arwen died of a broken heart at Cerin Amroth in Lórien, and was buried there one year after the death of Aragorn, to whom she had been wedded for 122 years.
After Aragorn's death, Legolas made a ship in Ithilien and left Middle-earth to go over the sea. His strong friendship with Gimli prompted Legolas to invite him to accompany him to the Undying Lands; making him the first and only Dwarf to do so. He was never seen again in Middle-earth.
Galadriel and Celeborn had a daughter named Celebrian, who married Elrond and became the mother of Arwen (as well as her brothers, Elladan and Elrohir).
I think it's probably fair to say that the Dunadain of both Arnor and Gondor considered themselves Numenoreans in exile. Aragorn himself told Arwen on his deathbed that he was “the last Numenorean”.
A recent post got me thinking about Aragorn and Arwen's children. He has one son, Eldarion, who takes over the United Kingdom once he passes on. And they have two unnamed daughters.
He did not inherit the choice of becoming an Elf, but had a long youth like one, having an appeareance of 20 years old until 60. Eldarion became the second King of the Reunited Kingdom after the death of his father Elessar in Fo. A. 120.
Isildur's father was Elendil, descended from Elros, founder of the Kingdom of Númenor. Since Elros was half-elven, from the marriage of Beren to the elf Lúthien, he and his descendants enjoyed much longer life than other men.
In the year 121 of the Fourth Age, after Aragorn's death, Arwen died of a broken heart at Cerin Amroth in Lórien, and was buried there one year after the death of Aragorn, to whom she had been wedded for 122 years. She was 2901 years old.
Legolas does not marry or have any children, based on the appendix of The Lord of the Rings. Regardless of who his mother was, Legolas is the last of his line. When he sails into the West at the beginning of the Fourth Age, he leaves no family members behind.
It is later mentioned that Tauriel is a talented warrior and was therefore made leader of the Mirkwood border guards. Legolas, the son of Mirkwood's Elven king Thranduil, is indicated to be attracted to her, but as she is a lowly Silvan Elf, she does not believe herself worthy of him.
No, Legolas was a Silvan Elf whereas Galadriel was Noldorin. It is possible that Legolas was related to some of the Elves of Lothlorien, but not to Galadriel.
Arwen Undómiel, often called Arwen Evenstar, was one of the half-elven, married to Aragorn II. She was the daughter of Elrond and Celebrían. She was considered to be the fairest of the Children of Ilúvatar in the Third Age, resembling Lúthien of the First Age who would never again appear in Ëa.
Her situation in the Lord of the Rings is a little bit different in that she's not tied to the One Ring at all. It's not sucking out her life force as it gets closer to its own doom. Rather, she's chosen mortality to stay on Middle Earth with Aragorn and has begun to feel the passing of time.
Aragorn ruled over Gondor for 120 years, and it was an era of glorious peace. He and Arwen had a number of children during their reign, but they only had one son: Eldarion. Eldarion was his father's heir, and he ended up ruling from Minas Tirith just like his father.
"He was Aragorn son of Arathorn, the nine and thirtieth heir in the right line from Isildur, and yet more like Elendil than any before him." Aragorn was a descendant of Elros Tar-Minyatur.
And when they later meet at Rivendell, the two clearly have a long history together stretching long before joining the Fellowship. This isn't surprising, as, despite their looks, Aragorn is 87 during this era, and Arwen is over 2700 years old, so they've had more than enough time to know each other.
In terms of genealogy, Elros would be Aragorn's great grandfather with about 60 "greats." This makes Elrond Aragorn's great, great, etc. uncle, and since Arwen is the Lord of Rivendell's daughter, she and Aragorn are first cousins many times removed.
