I think footnoting is an appropriate means of dealing with it. I'd also say you should use the term when speaking in direct connection with her work, but another word when talking more generally. By which I mean -- to invent an example -- that I if I were writing about someone who had written a lot about Christopher Marlowe, usually calling him Kit, I'd say "Kit" when talking about the man as seen in the text, and "Marlowe" when talking about him through my own lens. Does that make sense?