Original name: The Young Rascals
Became: The Rascals
Original name: Small Faces
Became: Faces
Original name: Chicago Transit Authority
Became: Chicago
Original name: The Silver Beatles
Became: The Beatles
Original name: Jefferson Airplane
Became: Jefferson Starship
Became: Starship
Original name: Tyrannosaurus Rex
Became: T. Rex
Original name: Grand Funk Railroad
Became: Grand Funk
Original name: White Heart
Became: Heart
Original name: The Pink Floyd Sound
Became: Pink Floyd
And…
Dr. Hook & The Medicine Show became Dr. Hook
The Jackson Five became The Jacksons
The Osmond Brothers became The Osmonds
The Jazz Crusaders became The Crusaders
Strawberry Hill Boys became Strawbs
Every Moment Has A Song 