I think Sasquatch’s idea about Rey’s father being a Sith scientist who ran away is great, but I still prefer Rey nobody, so I’m gonna have to agree with RogueLeader here.
I’m kind of surprised both you and Rogue seem to think the scientist idea clashes with Rey Nobody. In the grand scheme of things, some clone scientist and his family would be nobody compared to legends such as the Skywalkers and the Palpatines.