Sindarin 

erien

proper name. Erien

A proposed daughter of Fingon, first written as Ernis, but rejected when Tolkien decided that Fingon “has not child or wife” (PM/361 note #35). The meaning of her name is unclear, but it may be a combination of er “one” and the feminine suffix -ien.

Sindarin [PMI/Erien] Group: Eldamo. Published by