Defjam was a Swedish Amiga cracking group, born towards the end of 1987 by Gehenna, Archmage and a third guy who soon after left the scene. At various times, they were in cooperation with several groups - including Red Sector Inc., Spreadpoint, Computerbrains Copy Serivce, Accumulators, Genesis and Angels. The group was interviewed for Cracker Journal 10 (november 1988).
The Digital Technology release of 1943 ++ (presumably in very late july 1989) mentioned they were, "ON OUR MINI PARTY THAT WE HAD TOGETHER WITH TOP SWAP AND DEFJAM".
Swapper advert in Cracker Journal 19 (march 1990), listing a PLK in Hütschenhausen, Germany.