How The Heck Did They Get Those Names?

My book is simply about how groups and singers got their names. Many started with a variety of different names before becoming the name we are all familiar with. For example, would you be able to name the group that started with the following names: The Blackjacks, the Quarrymen, Johnny and the Moondogs, the Beat Brothers? Those were early names of the group we now know as the Beatles! And there are so many others.