Jessica Jones was supposed to be Jessica Drew originally. I think Marvel was hesitant to include a Spider-character (even though she's never been associated to Spider-Man and hadn't been relevant for decades) in something as mature and as explicit as Alias so Bendis was forced to create an original character. Hence why he retconned her past existence in the MCU. This is why Jessica Jones was a P.I. (Jessica Drew was one during her solo series), why she had a friendship with Carol Danvers, and also why she was given the name Jessica in the first place, because all these attributes were meant to be part of his story for Jessica Drew.