"Helevorn" is one of the nicknames I have been using over the time.. it was a big lake in Tolkien's "Silmarillion", on which shores Caranthir used to live. And it was destroyed in the War of Wrath. "Helevorn" means "black glass" in Sindarin.
From 14 to 18 yo I read practically everything Tolkien has ever written
; many years have passed so I don't remember that much, but I still love him.
Some years ago I found out that "Helevorn" is also a doom metal band from Palma de Mallorca, but I have never heard anything of them