My friend is in a similar band that has 5 aliases. I honestly have no idea how they came about, other than they were very talented ran with the gimmick, developed other gimmicks that worked with similar music they could cover and hired a few booking agencies.
I often wondered why someone didn't franchise convention/wedding bands.
Pod Club #19
Short Scale Bass Club #19
Mediocre Bassists #166
Florida Bassists #104