Gaurin

Gaurin was a character of the First Age whos Glaive was mentioned by Beleg Cúthalion in a sharpening spell he casten on his knife.

"(...)Glaive of Gaurin whose gleaming stroke did rive the rocks of Rodrim's hall(...)".

Rodrim probably means "Caves" or "Domes" and seems to be a placename rather than a personal name.Gaur- indicates Werewolf or Warg so Gaurin might be translated as "The Wolf-like-one" or "The one who is like a Werewolf" or possibly "Descendant of a Werewolf".

It might be possible that Gaurin was indeed a Werewolf and the Caves od Rodrim refers to Morgoth's Halls of Thangorodrim.