Yes, in this other idea on Nev’s thread she’d be biologically related to her mother, like Anakin is to Shmi. It’s the only way to preserve most of TLJ’s reveals as her parents being nobody (and herself to a certain extent) while also having Rey be viewed as a Palpatine.
In fact, I could do without the shift of Palpy’s “kill me, and my spirit will pass into you…” line going back to where it was (since that would obviously require video). It would just be cool to reinstate a reference to a ROTS scene that would become extremely important in this context.