When I was a child, I read a Spider-Man comic where Spider-Man was not Peter Parker, but rather a guy with a beard and a costume that left his arms bare except for the wristbands and his web-slingers. Somewhere in that comic, as far as I remember, he mentioned that he is the brother of Peter. Can anyone give me more information about that? Or was it just a dream of mine? :)
It could be Ben Reilly. He had wrist bands for the web shooters, he was Peter Parker's clone who was presented as his cousin (which you could have interpreted as brother) and during the clone saga he often had an untidy appearance
There was also Kaine, another clone but I don't recall him being Spider-man.