I don't have a guess, but I have a few poks at it.
Stoneland=Gondor
I can't think of any "Lord of Stone" that would be a servant of Gondor (Gonhirrim come to mind, but that doesn't fit).
I guess I could make some person from the Battle of Pelennor fit, but I don't recall any of them betraying friends (what I think the second line means...)
EDIT: On a second thought, maybe Saruman. Baing lord of Isengard, on the property of Gondor, betrays friends, dies and tried to go westward (towards sunset) but fails. Also, the sunset could refer to the end of the War, metaphorically.
Why does the word "hands" bug me?
