Lloyd E. Williams Jr. was a civil defense lawyer who battled opponents in the courtroom and befriended them afterward. The attorney who worked on more than 250 jury trials and was a founding partner of Williams, Montgomery & John Ltd. died Tuesday at Evanston Hospital of complications from Parkinson’s disease. He was 79.C. Barry Montgomery, another founding member of the firm, said his longtime law partner and friend should be remembered as one of the last of the old-school defense lawyers. Williams enjoyed …