There is a dunmer woman in the Necrom chapter whose first name is Barenziah. She has no unique dialogue or interactions. I'm not sure if she is killable. Does she have any relation to queen Barenziah? Is it just a common enough first name, is it a family/house name? I recall hearing that queen Barenziah lived over a thousand years, which does work for ESO timeline. I just don't know if this specific year we play in fits what is known about her.