This may seem like a rather stupid question, but is the Nerevarine also referred to as 'Nerevar Moon-and-Star' at times? Or just 'Moon-and-Star', perhaps? I know some people in Morrowind call him the Nerevar, I'm just unsure on 'Moon-and-Star'.

I think that he's referred as Nerevar Moon-and-Star on occasion, there's also a book with the same title.

Aye, but that's on the Nerevar, not the Nerevarine.