Susmita Basu Majumdar is an Indian historian, epigraphist and numismatist. She is a professor in the Department of Ancient Indian History at the University of Calcutta. With her nom-de-plume Adaa, she is a poet in the Hindi and Urdu languages, and a musician. Dr. Susmita Basu Majumdar, presently Head, Ancient History and Culture Department of Calcutta University.