Eden meaning "place of pleasure" from the bible and Raine being like rain could mean something to the affect of "pleasent rain."
I too know a bitch name Whitney. It isnt a very nice name.
I actually think both names have a nice flow especially together.
Rein is a nice way to spell it
Also Elizabeth is a nice name but to be unique any of these if a variation:ElisabethElizabettaElisabettaElizabetElisabetEliseElizaElivibethElivabetaElizaveta
Just diff. versions....