Some more: Xa Fel, Nal Hutta, Kessel, Bespin, New Cov, Anoat, Ryloth, Ithor, Ruuria, Ord Trasi, Filve, Ord Mantell, Ord Pardron, Algarian, Gamorr(?), Garqi, Abregado, Varl.... That's all I can think of, you may have some problem if you colonize too many Rim worlds, like the Rebel HQ appearing in one of your colonized worlds...