Aragorn - Descendant of Isildur and heir to the throne of Gondor.

"'And here in the house of Elrond more shall be made clear to you,' said Aragorn, standing up.  He cast his sword upon the table that stood before Elrond, and the blade was in two pieces.  'Here is the Sword that was Broken!' he said.  'And who are you, and what have you to do with Minas Tirith?' asked Boromir, looking in wonder at the lean face of the Ranger and his weather-stained cloak.  'He is Aragorn son of Arathorn,' said Elrond; 'and he is descended through many fathers from Isildur Elendil's son of Minas Ithil.  He is the Chief of the Dúnedain in the North, and few are now left of that folk.'" ~The Fellowship of the Ring, Book II, chap. 2 (The Council of Elrond)