What you are saying makes sense; it goes with what the obituary said about her record label reinventing her after the advent of rock and roll. I found her name change at that time to be particularly interesting in that regard. Given that only her surname changed, and since Lola wasn't that common of a name, it would seem that they weren't really trying to hide who she actually was -- they just figured that a rebranding might help her to be more accepted as a rock and roll artist.