My wife and I passed a billboard advertising Creedence Clearwater Revisited, which is not quite the same as Creedence Clearwater Revival, having been formed by two members of the original band (but not John Fogerty). This is a knockoff band; they even have a CD consisting of covers of Creedence Clearwater Revival songs.
We got to thinking - what if other bands had knockoff versions with former minor menbers? What would they be called?
We thought of:
Aerosmith > Aerojones
The Beach Boys > The Beach Erosion Boys
Red Hot Chili Peppers > Mild Chili Peppers
The Rolling Stones > The Stationary Stones
What else do you guys have? No points for the obvious Beatles > Monkees joke.
When Anderson, Bruford, Wakeman, & Howe reunited in the late '80s, they toyed with the name “The Affirmative” before deciding on using their last names.
Dream Theater has been known to switch up their instruments on stage, calling themselves Nightmare Cinema.
Anyway, a couple of ideas…
Prince Crimson
Spock’s Stubble
Gentle Ogre
Fuchsia Floyd
Hedgehog Tree
Return to a Few Thousand Years from Now
The Security Guards
I always thought the New Yardbirds was a lousy name and was glad to see Spinal Tap thought so too:
David: And we had to change our name actually…
Nigel: Well there was, there was another group in the east end called The Originals and we had to rename ourselves.
David: The New Originals.
Nigel: The New Originals and then, uh, they became…
David: The Regulars, they changed their name back to The Regulars and we thought well, we could go back to The Originals but what’s the point?
There’s also a band which covers AC/DC tunes as country songs called Hayseed Dixie. No former members of the tributed band are involved, so it doesn’t quite fit the OP’s requirements, but that’s hard to beat as a knockoff name.
Celebrity spouse Mrs. Stephen Fry has gone on record as affirming that some of her husband’s favorite bands are Earth, Wind and Frank, Nearvana, and I Can’t Believe It’s Not Emerson, Lake and Palmer.
…which brings to mind another real knockoff band: Keith Emerson and Greg Lake reformed ELP in the late 1980s and managed to retain the initials by substituting Cozy Powell for Carl Palmer.