I'm waiting on a Blues Brothers 3 of some sort with Jim Belushi in it playing the role he was supposed to play: The blood brother of Jake Blues, Brother Zee Blues.
Did you know that Jake's mother died having him while in prison, but in the treatment for BB2K Zee (with a different name) was supposed to be Jake's baby brother? Jim and John's real mother was going to cameo as Jake's mom in the film.
Elwood J. Blues is taking the name Jake as a middle name and obviously changing his last name from Delaney, the last name of the officer who delivered the abandoned child to the orphanage. He was named Elwood because Sister Mary Stigmata had a habit of naming the children by the letter of the alphabet, and she was obviously up to the "E"s.
Jake E. Blues takes "Elwood" as a middle name. His last name was Papageorge or Papageorgio (can't recall right this second). After being born, he was delivered to the orphanage.
I think that BB2K was good about handling the passing of Jake by not saying how he passed away, but I think (personally) it was an Al Capone kind of thing: pneumonia, paranoia that he was being poisoned kept him from his med's, passed away in prison--like his mom. Befitting, I reckon.