Only SIX of the band names below are eponymous (i.e., derived from the birth name of a founding member.) Identify them, and also specify where the 20 non-eponymous bands got their 'personal' name.
The "source" link below is one of many sites I used to research this game. However, I'd suggest all veteran Music Sporclers click through, because one of the names in the discussion thread will be very familiar to you. :-)