Isildur

Isildur was one of the Founders of Gondor, the eldest son of King Elendil, brother of Anárion, and father of Elendur, Aratan, Ciryon and Valandil. He was also the ancestor of Aragorn and Eldarion. 
== The Lord of the Rings: The Fellowship of the Ring ==
=== The Last Alliance ===
In he year 3434 of the second age, during the prologue, Isildur was one of the many warriors to fight off Sauron and his forces. Isildur witnessed his father's death at the hands of the Dark Lord. He took his father's broken sword and used it to cut off Sauron's finger that bore the One Ring. Isildur took the ring for himself. Elrond, who was a young elf at the time, saw Isildur pick up the evil ring and took him to Mount Doom. He urged Isildur to cast the ring in the fires of the mountain. However, Isildur was corrupted by the Ring's influence and refused.
He married an unknown woman and had four children. He was killed on the road by Orcs, who could sense him by scent before killing him. 
== Legacy ==
Centuries after Isildur's death, the Line of Kings fell to lesser sons and instead, the realm of Gondor fell under rule of a Stewardship.
Of his descendants, Isildur's descendant Aragorn feared that he will one day end up like Isildur and succumb to wanting the Ring's influence. However, his lover and eventual wife, Arwen, assured him he was nothing like Isildur.
Many years later, Elrond told Gandalf how he once tried to get Isildur to throw the Ring into the fires, but ultimately, failed. He was haunted by it for years.