That's a very special clue ... water as a mirror, and incorporating his love for Andreth as well as his death. Love it!
SILMARIEN was a foremother of kings, although not actually a queen.
It's debatable whether she was in the end less famous than her younger brother, though, who took the crown because a woman could not inherit it at that point.
Am I right to be looking for a female character *ending* in N, as it says she runs back?