IsildurIsildur - The elder son of Elendil and founder of the Northern Kingdom of Arnor.  It was he who took his father's sword, Narsil, and cut the Ring of Power from Sauron's hand.

 

"'Then Elendil the Tall and his mighty sons, Isildur and Anárion, became great lords; and the North-realm they made in Arnor, and the South-realm in Gondor above the mouths of Anduin.  But Sauron of Mordor assailed them, and they made the Last Alliance of Elves and Men, and the hosts of Gil-galad were mustered in Arnor...but Sauron himself was overthrown, and Isildur cut the Ring from his hand with the hilt-shard of his father's sword, and took it for his own.'" ~The Fellowship of the Ring, Book II, chap. 2 (The Council of Elrond)