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.
So Arwen is a descendant of Elrond and Aragorn is a distant descendant of Elros, who are brothers, which shows their kinship. But Arwen is Elrond's daughter, whereas Aragorn doesn't appear in the family tree for many more generations.
Aragorn was a descendant of Elros Tar-Minyatur through the line of the Lords of Andúnië to Elendil, High King of Arnor and Gondor. Like all of the kings before him, he was related to Elrond through the House of Elros.
Arwen serves as inspiration and motivation for Aragorn, who must become King of both Arnor and Gondor before Elrond will allow her to marry him. 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.
Arwen probably got to know Legolas as her husband's friend and as the leader of the Elven colony in Ithilien. As Mary Tower points out, it is possible that they are distantly related, but it's nowhere stated.
The Complete Travels of Aragorn | Tolkien Explained
What is Legolas syndrome?
The actor is suffering from Legolas Syndrome — where you accidentally get cast into a role that suits you far more than your real-life looks, leaving you with a tricky predicament after the wrap party. Do you A) nick all the costumes and stay in character the rest of your working life, or B)
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.
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).
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.
"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.
Aragorn is not half Elf, although he is a descendant of Elros, who is half Elf (and the brother of Elrond, the half-Elf who raised him), which explains why Aragorn's life span is unusually long.
First off, Galadriel was the first cousin of Turgon, who was Elrond's great-grandfather, which made them first cousins thrice removed. Furthermore, Elrond was the great-great-grandson of Galadriel's uncle, Fingolfin.
A legend says that the Wizard Gandalf had brought such a stone, called the Elessar, from Valinor. He gave the Elessar to the Elven Lady Galadriel and remarked prophetically that she would pass it to another, who will also be called Elessar. From this would come Aragorn's royal name Elessar (Quenya for "Elfstone").
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.
Aragorn and Legolas are long-time companions and best friends since Legolas' father Thranduil sent him to live among the Rangers of the North. Aragorn and Legolas grew close, up to the point where Aragorn revealed his true identity to Legolas. Throughout his journeys, Aragorn and Legolas are as close as brothers.
Elrond didn't want his daughter to die. Her choosing to marry Aragorn meant she chose to die, not to sail into the west with her people. His qualms with Aragorn were more about Arwen's mortality than anything else.
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. I find it strange that JRR left them unnamed.
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”.
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.
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.
The Third Age. At the beginning of the Third Age, Elrond married Celebrían, daughter of Galadriel. They had three children: twin sons, Elladan and Elrohir, and a daughter, Arwen.
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.
Tauriel truly threw a wrench in Legolas' life when he fell in love with her. She was brave, fierce, and a protective leader of the guard. He was meant to be the dutiful son of King Thranduil, but in loving her, he became a stubborn, masterful archer instead. He loved exploration and adventure over his duties.
Legolas and Gimli's relationship is strong in The Lord of the Rings, even though it wasn't explicitly romantic in Tolkien's source material. The members of the Fellowship in The Lord of the Rings forge an unbreakable bond while on their mission to destroy the One Ring.
