III 2004 was the date of the birth of Mithrellas' eldest child, her son Galador. She also had a daughter, Gilmith, so she presumably remained in Belfalas for at least another year and quite possibly longer. At some point after Gilmith's birth, however, Mithrellas disappeared one night and was never seen again. She possibly found her way to a haven and thus into the West, but her fate remains unknown.

As a Silvan Elf, Mithrellas' name presumably comes from the little-known Silvan dialect, so a translation is difficult. Its elements mith, rel, las can perhaps be translated in sequence as 'grey' (or 'mist'), 'daughter' and 'leaf', but these interpretations, and indeed the meaning of the name as a whole, remain in the realms of speculation.