From Tolkien Gateway

Evranin was an Elf of Artanor, and the nurse of Elwing, according to the early version of the legendarium in The Book of Lost Tales. She helped Elwing escape the ruin of Artanor by the sons of Fëanor.

She, along with Gereth, a Gnome, also managed to smuggle the Nauglafring out of Artanor.[1]