Mr. David-Weill was sometimes referred to as the “Sun King.” “Everything revolved around Michel at Lazard,” William D. Cohan, the author of “The Last Tycoons: The Secret History of Lazard Frères & Co.” (2007), said in an interview.
Mr. Cohan worked at Lazard for six years. “To me it seemed like the most interesting and mysterious place on Wall Street. Private partnership, punching above its weight, small, elite, prestigious,”…