Arwen was a very distant relative of her husband Aragorn. Aragorn's ancestor, Elros Tar-Minyatur, the first King of Númenor, was her father Elrond's brother, who chose to live as a Man rather than one of the Eldar. Arwen eventually became Queen of the Reunited Kingdom of Arnor and Gondor when she married Aragorn, who was of the line of the Kings of Arnor. By Arwen and Aragorn's marriage, the long-sundered lines of the Half-elven were joined.