If you make your living as "The Edge" and your birth certificate says "David Howell Evans," the former is a Facebook page and the latter is a Facebook profile. That's pretty much always been the case and purpose of that distinction.

Pen/stage/derby/drag names are not real names and Facebook's policy has always been that you have to use your real name. This includes any sort of transition, in which case you should be required to use your real name until it's not your real name anymore.