Son of Elendil, and Aragorn’s ancestor, Isildur triumphed over Sauron by cutting the One Ring from his hand in the final stages of the Siege of Barad-dûr. He then refused to destroy the Ring, keeping it for his own use. Orcs killed Isildur sometime after the War of the Last Alliance, and the ring was lost to the River Anduin.
Isildur Character Timeline in The Fellowship of the Ring
The timeline below shows where the character Isildur appears in The Fellowship of the Ring. The colored dots and icons indicate which themes are associated with that appearance.
Book 2, Chapter 2
Book 2, Chapter 9
...stand over the River Anduin. These are carved in the likeness of his ancestors—the brothers Isildur and Anarion, who jointly ruled Gondor. Frodo agrees with Aragorn’s plan, and Boromir decides to... (full context)