(Now kicking myself! Thought I'd been through all his names!)
Hobbits probably dream of lamb shanks sometimes - and they would be long ones because that = more dinner.
Aragorn is lonely because he can't marry Arwen until he is king.
L A lonely one's dream, and his eccentric cousin's assaulter.
Maybe 'lonely one' means just take one letter from 'lonely.'
Hang on - does the troll get assaulted by the shank or the shin of the singer's Nuncle Tim's limb in Sam's troll song?
(Can't do the ONG or the dream bit, though).