The wife of Turgon, and mother of Idril Celebrindal, who, unlike the rest of her family, did not survive the crossing of the Helcaraxë, the Grinding Ice, the doom which Fëanor had left them to face.
References - Silmarillion
Elenwe is her name in Quenya. Wife of
Turgon. Died crossing
Helcaraxe. Turgon tried to save her and Idril by jumping into the
but only managed to save Idril.